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  • Title: A new bilobalide isomer and two cis-coumaroylated flavonol glycosides from Ginkgo biloba leaves.
    Author: Dong HL, Lin S, Wu QL, Su RX, Wu ZL, Dong HY, Li HL, Zhang WD.
    Journal: Fitoterapia; 2020 Apr; 142():104516. PubMed ID: 32081701.
    Abstract:
    A new bilobalide isomer (1), together with two flavonol glycosides (2, 3), have been isolated and elucidated from the extract of Ginkgo biloba leaves. Significantly, 1 was a new sesquiterpene lactone with two lactone ring groups, both 2 and 3 were two flavonol glycosides with a same cis-coumaroylated fragment. Their chemical structures were elucidated by NMR and MS spectroscopic date and the absolute configuration of 1 was specific established by Cu-Kα X-ray crystallographic analyses. However, 1-3 showed no obvious anti-platelet aggregation activity.
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