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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">pharmjournal</journal-id><journal-title-group><journal-title xml:lang="ru">Разработка и регистрация лекарственных средств</journal-title><trans-title-group xml:lang="en"><trans-title>Drug development &amp; registration</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2305-2066</issn><issn pub-type="epub">2658-5049</issn><publisher><publisher-name>LLC «CPHA»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.33380/2305-2066-2021-10-4(1)-129-137</article-id><article-id custom-type="elpub" pub-id-type="custom">pharmjournal-1111</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МЕТОДЫ АНАЛИЗА ЛЕКАРСТВЕННЫХ СРЕДСТВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ANALYTICAL METHODS</subject></subj-group></article-categories><title-group><article-title>Использование метода высокоэффективной тонкослойной хроматографии для обнаружения фармакологически активных вторичных метаболитов в водянике черной Empetrum nigrum L.</article-title><trans-title-group xml:lang="en"><trans-title>Using high performance thin layer chromatography for the detection of pharmacologically active secondary metabolites in Empetrum nigrum L.</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4879-9336</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Понкратова</surname><given-names>А. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Ponkratova</surname><given-names>A. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>197376, г. Санкт-Петербург, ул. Профессора Попова, д. 14, лит. А</p></bio><bio xml:lang="en"><p>14A, Prof. Popov str., Saint-Petersburg, 197376, Russia</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4847-5924</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Уэйли</surname><given-names>А. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Whaley</surname><given-names>A. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>197376, г. Санкт-Петербург, ул. Профессора Попова, д. 14, лит. А</p></bio><bio xml:lang="en"><p>14A, Prof. Popov str., Saint-Petersburg, 197376, Russia</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4847-5924</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лужанин</surname><given-names>В. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Luzhanin</surname><given-names>V. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>614990, Россия, г. Пермь, ул. Екатерининская, д. 110</p></bio><bio xml:lang="en"><p>101, Ekaterininskaya str., Perm, 614990, Russia</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9763-096X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жохова</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhokhova</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Жохова Елена Владимировна</p><p>197376, г. Санкт-Петербург, ул. Профессора Попова, д. 14, лит. А</p></bio><bio xml:lang="en"><p>Elena V. Zhokhova</p><p>14A, Prof. Popov str., Saint-Petersburg, 197376, Russia</p></bio><email xlink:type="simple">elena.zhohova@pharminnotech.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургский государственный химико-фармацевтический университет» Министерства здравоохранения Российской Федерации</institution></aff><aff xml:lang="en"><institution>Saint-Petersburg State Chemical-Pharmaceutical University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБОУ ВО «Пермская государственная фармацевтическая академия» Министерства здравоохранения Российской Федерации</institution></aff><aff xml:lang="en"><institution>Perm State Pharmaceutical Academy</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>25</day><month>12</month><year>2021</year></pub-date><volume>10</volume><issue>4</issue><issue-title>Приложение 1</issue-title><fpage>129</fpage><lpage>137</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Понкратова А.О., Уэйли А.К., Лужанин В.Г., Жохова Е.В., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Понкратова А.О., Уэйли А.К., Лужанин В.Г., Жохова Е.В.</copyright-holder><copyright-holder xml:lang="en">Ponkratova A.O., Whaley A.K., Luzhanin V.G., Zhokhova E.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.pharmjournal.ru/jour/article/view/1111">https://www.pharmjournal.ru/jour/article/view/1111</self-uri><abstract><sec><title>Введение</title><p>Введение. В статье представлены результаты обнаружения фармакологически активных вторичных метаболитов в водянике черной Empetrum nigrum L. с использованием метода высокоэффективной тонкослойной хроматографии (ВЭТСХ).</p></sec><sec><title>Цель</title><p>Цель. Показать эффективность метода ВЭТСХ для проведения предварительного фитохимического исследования и определения основных групп метаболитов перспективных видов растительного сырья.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. ВЭТСХ анализ выполнялся на приборе CAMAG (Швейцария), с использованием пластин MERCK HPTLC silica gel 60 F154, 20 × 10 см. Для выпаривания образцов использовался вакуумно-ротационный испаритель марки Heidolph (Германия). Надземная часть (побеги) Empetrum nigrum были заготовлены в районе питомника лекарственных растений Санкт-Петербургского государственного химико-фармацевтического университета (далее – СПХФУ) (Ленинградская область, Всеволожский район, Приозерское шоссе, 38 км) в августе 2019 года.</p></sec><sec><title>Результаты и обсуждение</title><p>Результаты и обсуждение. В ходе исследования из надземной части водяники черной получали четыре фракции: гексановую, дихлорметановую, бутанольную и водную. Затем эти фракции исследовались методом ВЭТСХ в двух системах растворителей – н-бутанол : кислота уксусная : вода (БУВ) (4:1:2) и гексан : дихлорметан : метанол (ГДМ) (1:2: 0,5). После проведения сканирующей денситометрии пластинки элюированной в системе ГДМ было выявлено, что в гексановая и дихлорметановая фракции имеют схожий состав пятен и содержат наибольшее количество соединений, по сравнению с бутанольной и водной фракцией, а в системе БУВ – что бутанольная фракция содержит наибольшее разнообразие метаболитов. После проведения УФ-спектроскопии обнаружено, что основными группами соединений, содержащихся в гексановой и дихлорметановой фракциях являются производные халконов, дигидрохалконов, бибинзилов а также 9,10-дигидрофенантренов. В то время, как в бутанольной фракции основными группами вторичных метаболитов являются производные флавоноидов и танинов.</p></sec><sec><title>Заключение</title><p>Заключение. Полученные данные позволяют отметить эффективность, экспрессность и наглядность метода ВЭТСХ для проведения предварительного фитохимического исследования и определения основных групп метаболитов перспективных видов ЛРС.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. The article presents the results of the detection of pharmacologically active secondary metabolites in black crowberry Empetrum nigrum L. using the method of high performance thin layer chromatography (HPTLC).</p></sec><sec><title>Aim</title><p>Aim. To show the efficiency of HPTLC for conducting preliminary phytochemical analysis to determine the main groups of metabolites in promising medicinal plant species.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. HPTLC analysis was carried out on a CAMAG device (Switzerland), using MERCK HPTLC silica gel 60 F154, 20 × 10 cm plates. For the evaporation of the samples, a Heidolph vacuum rotary evaporator (Germany) was used. The aerial parts (shoots) of Empetrum nigrum were harvested next to St. Petersburg State Chemical and Pharmaceutical University (SPCPU) nursery garden of medicinal plants (Leningrad Region, Vsevolozhsky District, Priozerskoe Highway, 38 km) in August 2019.</p></sec><sec><title>Results and discussion</title><p>Results and discussion. In the course of the research, four fractions from the aerial parts of Empetrum nigrum were obtained: hexane, dichloromethane, butanol, and water. Then, these fractions were investigated by HPTLC in two solvent systems – n-butanol : acetic acid : water (BAW) (4 : 1 : 2) and hexane : dichloromethane : methanol (HDM) (1 : 2 : 0.5). After scanning densitometric analysis of the plates eluted in the HDM system, it was revealed, that the hexane and dichloromethane fractions have a similar composition and contain the greatest amount of compounds, compared to the butanol and water fractions, and in the BAW system, it was found, that the butanol fraction contains the greatest variety of metabolites. As a result of UV spectroscopy, it was found, that the main groups of compounds contained in the hexane and dichloromethane fractions are derivatives of chalcones, dihydrochalcones, bibenzyls and 9,10-dihydrophenanthrenes. While in the butanol fraction, the main groups of secondary metabolites were derivatives of flavonoids and tannins</p></sec><sec><title>Conclusion</title><p>Conclusion. The data obtained allow us to note the efficiency, speed and simplicity of HPTLC for conducting preliminary phytochemical analysis to determine the main groups of metabolites of promising medicinal plant species.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>Empetrum nigrum</kwd><kwd>водяника черная</kwd><kwd>ВЭТСХ</kwd><kwd>вторичные метаболиты</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Empetrum nigrum</kwd><kwd>black crowberry</kwd><kwd>HPTLC</kwd><kwd>secondary metabolites</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Результаты работы получены с использованием оборудования ЦКП «Аналитический центр ФГБОУ ВО СПХФУ Минздрава России» в рамках соглашения № 075-15-2021-685 от 26 июля 2021 года при финансовой поддержке Минобрнауки России</funding-statement><funding-statement xml:lang="en">Research results were obtained using the equipment of the Center for Collective Use "Analytical Center of Saint-Petersburg State Chemical and Pharmaceutical University" within the framework of agreement No. 075-15-2021-685 dated July 26, 2021 with the financial support of the Ministry of Education and Science of Russia</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Хохлова Е. А. Оценка рисков при анализе лекарственного растительного сырья методом высокоэффективной тонкослойной хроматографии. Вестник фармации. 2017;76(2):43–49.</mixed-citation><mixed-citation xml:lang="en">Hohlova E. A. Ocenka riskov pri analize lekarstvennogo rastitel’nogo syr’ja metodom vysokojeffektivnoj tonkoslojnoj hromatografii [Risk assessment in the analysis of medicinal plant materials by high-performance thin-layer chromatography]. Vestnik farmacii. 2017;76(2):43–49. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Agatonovic-Kustrin S., Doyle E., Gegechkori V., Morton D. W. High-performance thin-layer chromatography linked with (bio) assays and FTIR-ATR spectroscopy as a method for discovery and quantification of bioactive components in native Australian plants. Journal of pharmaceutical and biomedical analysis. 2020;184:113208. DOI: 10.1016/j.jpba.2020.113208.</mixed-citation><mixed-citation xml:lang="en">Agatonovic-Kustrin S., Doyle E., Gegechkori V., Morton D. W. High-performance thin-layer chromatography linked with (bio) assays and FTIR-ATR spectroscopy as a method for discovery and quantification of bioactive components in native Australian plants. Journal of pharmaceutical and biomedical analysis. 2020;184:113208. DOI: 10.1016/j.jpba.2020.113208.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Amirvaresi A., Rashidi M., Kamyar M., Amirahmadi M., Daraei B., Parastar H. Combining multivariate image analysis with high-performance thin-layer chromatography for development of a reliable tool for saffron authentication and adulteration detection. Journal chromatography A. 2020;1628:461461. DOI: 10.1016/j.chroma.</mixed-citation><mixed-citation xml:lang="en">Amirvaresi A., Rashidi M., Kamyar M., Amirahmadi M., Daraei B., Parastar H. Combining multivariate image analysis with high-performance thin-layer chromatography for development of a reliable tool for saffron authentication and adulteration detection. Journal chromatography A. 2020;1628:461461. DOI: 10.1016/j.chroma.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Bruni R., Brighenti V., Caesar L. K., Bertelli D., Cech N. B., Pellati F. Analytical methods for the study of bioactive compounds from medicinally used Echinacea species. Journal of pharmaceutical and biomedical analysis. 2018;160:443–477. DOI: 10.1016/j.jpba.2018.07.044.</mixed-citation><mixed-citation xml:lang="en">Bruni R., Brighenti V., Caesar L. K., Bertelli D., Cech N. B., Pellati F. Analytical methods for the study of bioactive compounds from medicinally used Echinacea species. Journal of pharmaceutical and biomedical analysis. 2018;160:443–477. DOI: 10.1016/j.jpba.2018.07.044.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Avula B., Sagi S., Masoodi M. H., Bae J. Y., Wali A. F., Khan I. A. Quantification and characterization of phenolic compounds from Northern Indian propolis extracts and dietary supplements. Journal of AOAC International. 2020;103(5):1378–1393. DOI: 10.1093/jaoacint/qsaa032.</mixed-citation><mixed-citation xml:lang="en">Avula B., Sagi S., Masoodi M. H., Bae J. Y., Wali A. F., Khan I. A. Quantification and characterization of phenolic compounds from Northern Indian propolis extracts and dietary supplements. Journal of AOAC International. 2020;103(5):1378–1393. DOI: 10.1093/jaoacint/qsaa032.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Ebrahimi-Najafabadi H., Kazemeini S. S., Pasdaran A., Hamedi A. A novel similarity search approach for high-performance thinlayer chromatography (HPTLC) fingerprinting of medicinal plants. Phytochemical analysis. 2019;30(4):405–414. DOI: 10.1002/pca.2823.</mixed-citation><mixed-citation xml:lang="en">Ebrahimi-Najafabadi H., Kazemeini S. S., Pasdaran A., Hamedi A. A novel similarity search approach for high-performance thinlayer chromatography (HPTLC) fingerprinting of medicinal plants. Phytochemical analysis. 2019;30(4):405–414. DOI: 10.1002/pca.2823.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Frommenwiler D. A., Kim J., Yook C. S., Tran T. T. T., Canigueral S., Reich E. Comprehensive HPTLC fingerprinting for quality control of an herbal drug – the case of angelica gigas root. Planta medica. 2018;84(06/07):465–474. DOI: 10.1055/a-0575-4425.</mixed-citation><mixed-citation xml:lang="en">Frommenwiler D. A., Kim J., Yook C. S., Tran T. T. T., Cañigueral S., Reich E. Comprehensive HPTLC fingerprinting for quality control of an herbal drug – the case of angelica gigas root. Planta medica. 2018;84(06/07):465–474. DOI: 10.1055/a-0575-4425.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Khan M. I., Rahman M. A., Khalid M., Khushtar M., Mujahid M. Quality Control Standardization and evaluation of animicrobial potential of daruhaldi (Berberis aristata DC) stem bark. Journal of dietary supplements. 2020;17(1):97–109. DOI: 10.1080/19390211.2018.1484405.</mixed-citation><mixed-citation xml:lang="en">Khan M. I., Rahman M. A., Khalid M., Khushtar M., Mujahid M. Quality Control Standardization and evaluation of animicrobial potential of daruhaldi (Berberis aristata DC) stem bark. Journal of dietary supplements. 2020;17(1):97–109. DOI: 10.1080/19390211.2018.1484405.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Khokhlova K., Zdoryk O. Authentication of Rhodiola rosea, Rhodiola quadrifida and Rhodiola rosea liquid extract from the Ukrainian market using HPTLC chromatographic profiles. Natural product research. 2020;34(19):2842–2846. DOI: 10.1080/14786419.2019.1591398.</mixed-citation><mixed-citation xml:lang="en">Khokhlova K., Zdoryk O. Authentication of Rhodiola rosea, Rhodiola quadrifida and Rhodiola rosea liquid extract from the Ukrainian market using HPTLC chromatographic profiles. Natural product research. 2020;34(19):2842–2846. DOI: 10.1080/14786419.2019.1591398.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Sethuraman V., Janakiraman K., Krishnaswami V., Natesan S., Kandasamy R. Combinatorial analysis of quercetin and resveratrol by HPTLC in Sesbania grandiflora/phyto-based nanoformulations. Natural product research. 2021;35(13):2243–2248. DOI: 10.1080/14786419.2019.1662012.</mixed-citation><mixed-citation xml:lang="en">Sethuraman V., Janakiraman K., Krishnaswami V., Natesan S., Kandasamy R. Combinatorial analysis of quercetin and resveratrol by HPTLC in Sesbania grandiflora/phyto-based nanoformulations. Natural product research. 2021;35(13):2243–2248. DOI: 10.1080/14786419.2019.1662012.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Sharma A., Katiyar C. K., Banerjee S., Chanda J., Kar A., Biswas S., Mukherjee P. K. RP-HPLC and HPTLC Methods for Analysis of Selected Herbs Used as Complexion Promoters in Ayurveda and Unani Systems of Medicine. Journal of AOAC International. 2020;103(3):692–698. DOI: 10.5740/jaoacint.19-0290.</mixed-citation><mixed-citation xml:lang="en">Sharma A., Katiyar C. K., Banerjee S., Chanda J., Kar A., Biswas S., Mukherjee P. K. RP-HPLC and HPTLC Methods for Analysis of Selected Herbs Used as Complexion Promoters in Ayurveda and Unani Systems of Medicine. Journal of AOAC International. 2020;103(3):692–698. DOI: 10.5740/jaoacint.19-0290.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Reich E., Schibli A. High-performance thin-layer chromatography for the analysis of medicinal plants. New York, Stuttgart. 2006. 264 p. DOI: 10.1055/B-002-66241.</mixed-citation><mixed-citation xml:lang="en">Reich E., Schibli A. High-performance thin-layer chromatography for the analysis of medicinal plants. New York, Stuttgart. 2006. 264 p. DOI: 10.1055/B-002-66241.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Государственная фармакопея Российской Федерации. XIV издание. Доступно по: http://femb.ru/femb/pharmacopea.php. Ссылка активна на 28.10.2021.</mixed-citation><mixed-citation xml:lang="en">Gosudarstvennaya farmakopeya Rossiyskoy Federatsii. XIV izdaniya [State Pharmacopoeia of the Russian Federation. XIV Edition]. Available at: http://femb.ru/femb/pharmacopea.php. Accessed: 28.10.2021. (In Russ.)</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Тринеева О. В. Разработка теоретических подходов к определению основных групп биологически активных веществ лекарственного растительного сырья методом ТСХ. Разработка и регистрация лекарственных средств. 2021;10(2):69–79. DOI: 10.33380/2305-2066-2021-10-2-69-79.</mixed-citation><mixed-citation xml:lang="en">Trineeva O. V. Development of theoretical approaches to determination of the main groups of biologically active substances of medicinal plant raw materials by TLC method. Razrabotka i registratsiya lekarstvennykh sredstv = Drug development &amp; registration. 2021;10(2):69–79. (In Russ.) DOI: 10.33380/2305-2066-2021-10-2-69-79.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Понкратова А. О., Уэйли А. К., Орлова А. А., Смирнов С. Н., Серебряков Е. Б., Лужанин В. Г. Выделение и установление структуры трех димерных проантоцианидинов типа А из надземной части Empetrum nigrum L. Разработка и регистрация лекарственных средств. 2021;10(2):80–86. DOI: 10.33380/2305-2066-2021-10-2-80-86.</mixed-citation><mixed-citation xml:lang="en">Ponkratova A. O., Whaley A. K., Orlova A. A., Smirnov S. N., Serebryakov E. B., Luzhanin V. G. Isolation and structure elucidation of three dimeric A-type proanthocyanidins from Empetrum nigrum L. Razrabotka i registratsiya lekarstvennykh sredstv = Drug development &amp; registration. 2021;10(2):80–86. (In Russ.) DOI: 10.33380/2305-2066-2021-10-1-83-89.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Ponkratova A. O., Whaley A. K., Balabas O. A., Smirnov S. N., Proksch P., Luzhanin V. G. A new bibenzyl and 9,10-dihydrophenanthrene derivative from aerial parts of crowberry (Empetrum nigrum L.). Phytochemistry letters. 2021;42:15–17. DOI: 10.1016/j.phytol.2021.01.001.</mixed-citation><mixed-citation xml:lang="en">Ponkratova A. O., Whaley A. K., Balabas O. A., Smirnov S. N., Proksch P., Luzhanin V. G. A new bibenzyl and 9,10-dihydrophenanthrene derivative from aerial parts of crowberry (Empetrum nigrum L.). Phytochemistry letters. 2021;42:15–17. DOI: 10.1016/j.phytol.2021.01.001.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Ponkratova A. O., Whaley A. K., Orlova A. A., Smirnov S. N., Serebryakov E. B., Proksch P., Luzhanin V. G. A new dimethoxy dihydrochalcone isolated from the shoots of Empetrum nigrum L. Natural Products Research. 2021. DOI: 10.1080/14786419.2021.1920584.</mixed-citation><mixed-citation xml:lang="en">Ponkratova A. O., Whaley A. K., Orlova A. A., Smirnov S. N., Serebryakov E. B., Proksch P., Luzhanin V. G. A new dimethoxy dihydrochalcone isolated from the shoots of Empetrum nigrum L. Natural Products Research. 2021. DOI: 10.1080/14786419.2021.1920584.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Wollenweber E., Dörr M., Stelzer R., Arriaga-Giner F. J. Lipophilic phenolics from the leaves of Empetrum nigrum – chemical structures and exudate localization. Botanica acta. 1992;105:300–305. DOI: 10.1111/J.1438-8677.1992.TB00302.X.</mixed-citation><mixed-citation xml:lang="en">Wollenweber E., Dörr M., Stelzer R., Arriaga-Giner F. J. Lipophilic phenolics from the leaves of Empetrum nigrum – chemical structures and exudate localization. Botanica acta. 1992;105:300–305. DOI: 10.1111/J.1438-8677.1992.TB00302.X.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Krasnov E. A., Ermoliva E. V., Kadyrova T. V., Raldugin V. A. Phenolic components of Empetrum nigrum extract and the crystal structure of one of them. Chemistry of natural compounds. 2000;35(5):493–496. DOI: 10.1023/A:1002887406817.</mixed-citation><mixed-citation xml:lang="en">Krasnov E. A., Ermoliva E. V., Kadyrova T. V., Raldugin V. A. Phenolic components of Empetrum nigrum extract and the crystal structure of one of them. Chemistry of natural compounds. 2000;35(5):493–496. DOI: 10.1023/A:1002887406817.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Jarevang T., Nilsson M-C., Wallstedt A., Odham G., Sterner O. A bibenzyl from Empetrum nigrum. Phytochemistry. 1998;48(5):893–896. DOI: 10.1016/S0031-9422(97)00955-2.</mixed-citation><mixed-citation xml:lang="en">Jarevang T., Nilsson M-C., Wallstedt A., Odham G., Sterner O. A bibenzyl from Empetrum nigrum. Phytochemistry. 1998;48(5):893–896. DOI: 10.1016/S0031-9422(97)00955-2.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Kellogg J., Wang J., Flint C., Ribnicky D., Kuhn P., Mejia E. G., Raskin I., Lila M. N. Alaskan Wild Berry Resources and human health under the cloud of climate change. Journal of agricultural and food chemistry. 2010;58(7):3884–900. DOI: 10.1021/jf902693r.</mixed-citation><mixed-citation xml:lang="en">Kellogg J., Wang J., Flint C., Ribnicky D., Kuhn P., Mejia E. G., Raskin I., Lila M. N. Alaskan Wild Berry Resources and human health under the cloud of climate change. Journal of agricultural and food chemistry. 2010;58(7):3884–900. DOI: 10.1021/jf902693r.</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Määttä K. R., Kamal-Eldin A., Mattila P. H., Gonzalez-Paramas A. M., Törrönen R. Distribition and contents of phenolic compounds in eighteen Scandinavian berry species. Journal of agricultural and food chemistry. 2004;52(14):4477–86. DOI: 10.1021/jf049595y.</mixed-citation><mixed-citation xml:lang="en">Määttä K. R., Kamal-Eldin A., Mattila P. H., Gonzalez-Paramas A. M., Törrönen R. Distribition and contents of phenolic compounds in eighteen Scandinavian berry species. Journal of agricultural and food chemistry. 2004;52(14):4477–86. DOI: 10.1021/jf049595y.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
