Abstract
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.
