1996 Volume 44 Issue 3 Pages 481-485
In a continuing study on resin glycosides of crude drugs originated from Convolvulaceae plants, we examined the seeds of Cuscuta chinensis. Two novel acylated trisaccharides named cus-1 and cus-2 were isolated, together with a mixture of resin glycoside-like compounds. Their structures were defined as α-L-rhamnopyranosyl-(1→3)-[2-O-(11S)-11-hydroxytetradecanoyl]-[4-O-(2R, 3R)-3-hydroxy-2-methylbutyryl]-α-L-rhamnopyranosyl-(1→2)-[6-O-acetyl]-D-glucopyranose and α-L-rhamnopyranosyl-(1→3)-[2-O-(11S)-11-hydroxyhexadecanoyl]-[4-O-(2R, 3R)-3-hydroxy-2-methylbutyryl]-α-L-rhamnopyranosyl-(1→2)-[6-O-acetyl]-D-glucopyranose, respectively. They are considered to be closely related to so-called resin glycosides in terms of structure and biosynthesis.
