Các triterpenoid phân lập từ thân cây giác mộc Bắc Bộ (Cornus hongkongensis subsp. tonkinensis, họ Cornaceae)

Five triterpenes (CH1-CH5) were isolated from the ethyl acetate extract of Corrnus hongkongensis subsp. tonkinensis (W.P.Fang) Q.Y.Xiang (Cornaceae) collected in Sapa, Lao Cai, including calenduladiol (CH1), pseudotaraxasterol (CH2), betulin (CH3), maniladiol (CH4), and 18α-oleanan-3β,19α-diol (CH5). Their structures were elucidated by analyzing extensive NMR and MS, comparing with reported literature data. This is the first report on the presence of all isolates in this plant.
Keywords: Cornus hongkongensis subsp. tonkinensis, calenduladiol, pseudotaraxasterol, betulin, maniladiol,
18α-oleanan-3β,19α-diol.

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