Korean Journal of Pharmacognosy (생약학회지)
- Volume 24 Issue 1
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- Pages.54-57
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- 1993
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- 0253-3073(pISSN)
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- 2288-9299(eISSN)
Seasonl Variations of Biflavone Content from Ginkgo biloba Leaves
은행잎 중 Biflavone의 계절별 함량 변화에 관한 연구
- Chang, Soo-Kyung (College of Pharmacy, Chung-Ang University) ;
- Youm, Jeong-Rok (College of Pharmacy, Chung-Ang University) ;
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Kang, Sam- Sik
(Natural Products Research Institute, Seoul National University)
- Published : 1993.03.30
Abstract
The seasonal variations of five biflavones from Ginkgo biloba leaves from May to November were investigated by a reversed phase HPLC method. The total amount of biflavones was increased with time to reach its maximum in yellow autumnal leaves. Each biflavone showed a similar tendency. It increased rapidly about 3.1-fold from May to June and thereafter gradually increased about 2.5-fold. The ratio of each biflavone content to the total amount of biflavones was in the order of as follows: isoginkgetin>sciadopitysin>bilobetin>ginkgetin>amentoflavone.