Эльдар (El'dar) Новруз (Novruz) Новрузов (Novruzov)
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Закир (Zakir) Гусейн (Gusejn) Мамедов (Mamedov)
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Латафат (Latafat) Ахад (Аkhad) Мустафаева (Mustafaeva)
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Хураман (Khuraman) Миргасан (Mirgasan) Мирюсифова (Miryusifova)
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Айдан (Аjdan) Мирза (Mirza) Зейналова (Zeynalova)
Seabuckthorn – Hippophae rhamnoides L. is a valuable food, vitamin and medicinal plant, various parts of which are used to treat diseases as a traditional medicine in many countries of the world. All parts of Hippophae rhamnoides L. are a rich source of biologically active substances, especially polyphenolic compounds, carotenoids, phytosterols and others. Extracts obtained from various sea buckthorn organs possess high antioxidant, antibacterial, antimicrobial, anti-inflammatory, antikanserogenic, antiradiation properties. Analysis of leaves of H. rhamnoides on the content of flavonoids showed that they contain from 2.81 to 3.2% flavonoids. Chromatographic spectrophotometric methods were used to study the qualitative composition and content of the leaf flavonoids of male H. rhamnoides. Five individual flavonoids were isolated from the sum of flavonoids, the isolated flavonoids identified as quercetin, mirisetin, isoramnetin, quercetin-3-rutinoside (rutin) and isoramnetin-3-rutinoside (narcissine), on the basis of chromatographic data, UV spectra, and acid hydrolyses. Routine and narcissine are the main components of leaves of H. rhamnoides. It has been established that the content of flavonoids is significant, with the main components being biologically active flavonoids such as rutin and narcissine, thus the leaves of the male sea buckthorn are a promising source of raw materials for the production of P vitamins and food additives.