作者:Sylvain Rodriguez、Jean-Luc Wolfender、Kurt Hostettmann、Helen Stoeckli-Evans、Mahabir P. Gupta
DOI:10.1002/hlca.19980810548
日期:——
A new acylated dimeric secoiridoid glycoside, seemannoside A (2), has been isolated from the aerial parts of Lisianthius seemannii (GRISEB) O. KUNTZE (Gentianaceae). The structure was established by spectroscopic analysis (UV, MS, 1H- and 13C-NMR, and 2D-NMR experiments) and chemical reactions as (E-4′-O-p-coumaroyl)lisianthioside. The structure of the (Z)-isomer (seemannoside B, 3), also present in
一种新的酰化的二聚类的类蛇药苷糖苷,seemannoside A(2),已从Lissianthius seemannii(GRISEB)O. KUNTZE(龙胆草科)的地上部分中分离出来。结构通过光谱分析(UV,MS,建立1 H-和13 C-NMR,和2D-NMR实验)和化学反应为(ë -4'- ø - p lisianthioside -coumaroyl)。还存在于植物中的(Z)-异构体(Seemannoside B,3)的结构通过LC / UV / 1 H-NMR分析得到证实。活性成分6,负责非极性提取物的抗真菌活性黄瓜枯萎病菌已被分离。它的结构已通过NMR光谱和X射线晶体学分析确定为稀有类型的糖苷配基单萜二聚体。