Sixteen new acylated iridoid glycosides, called buddlejosides A1-A16, were isolated from Buddleja japonica HEMSL., together with four known iridoid glycosides; 6-vanilloyl-ajugol, 6-feruloyl-ajugol, verbascoside A, and 6-O-[α-L-(4-O-feruloyl)-rhamnopyranosyl]-catalpol. Structures of the new compounds were determined on the basis of chemical and spectroscopic evidence. Buddlejosides A1 was an ajugol derivative acylated with monoterpenic acid, A2 was an sinuatol and A3-A16 were 6-rhamnopyranosyl-catalpol derivatives acylated with cinnamic acid derivative and acetic acid.
从日本紫苑(Buddleja japonica H
EMSL.)中分离出了十六种新的酰基化马兜铃苷,称为buddlejosides A1-
A16,同时还分离出了四种已知的马兜铃苷;它们分别是6-香草酰-ajugol、6-阿魏酰-ajugol、verbascoside A和6-O-[α-L-(4-O-阿魏酰)-rhamnopyranosyl]-catalpol。这些新化合物的结构是基于
化学和光谱证据确定的。Buddlejosides A1是与单萜酸酰化的ajugol衍
生物,A2是sinusol,A3-
A16是与
肉桂酸衍
生物和
醋酸酰化的6-
鼠李糖基-catalpol衍
生物。