Tetracyclic triterpenes and other constituents from the leaves and bark of Larix kaempferi
作者:Hironori Ohtsu、Reiko Tanaka、Takashi Michida、Tetsuro Shingu、Shunyo Matsunaga
DOI:10.1016/s0031-9422(98)00302-1
日期:1998.11
Two new triterpenes were isolated from the leaves of Larix kaempferi together with two known compounds, 24-methylenecycloartanone and 24-methylenecycloartanol. A new triterpene-triol, nine known compounds, n-alkyl trans-ferulates and trans-p-coumarates, rheosmin, five stigmastanes and friedelin were isolated from the stem bark. These new compounds were characterized as cycloartan-3,24-dione, 24-me
从 Larix kaempferi 的叶子中分离出两种新的三萜以及两种已知的化合物 24-亚甲基环木霉酮和 24-亚甲基环木霉醇。从茎皮中分离出一种新的三萜三醇、九种已知化合物、n-烷基转阿魏酸酯和反式对香豆酸酯、rheosmin、5 个柱头烷和 Friedelin。根据化学和光谱证据,这些新化合物被表征为 cycloartan-3,24-dione、24-methylenecycloartan-3alpha-ol 和 lanost-9(11)-en-3alpha,24S,25-triol。