Trachelospermum. III. Trachelosperosides, glycosides of 19.ALPHA.-hydroxyursane-type triterpenoids from Trachelospermum asiaticum.

From the whole plant of Trachelospermum asiaticum, sixteen triterpenoid glycosides wereisolated. Eight of them, including two known glucosides, suavissimoside Rl and the 3, 28-bis-O-glucoside of 19α-hydroxyasiatic acid, were determined to be 28-O-or 3, 28-bis-O-glucosides of 19α-hydroxyursolic acid derivatives, except for one 28-O-xylosyl-glucoside. The most major compound was the 28-O-glucoside of 2α, 3β, 19α, 23, 24-pentahydroxyurs-12-en-28-oic acid.