抄録
Five triterpene glycosides, named α-, β1-, β2-, β3-, and β4-fatsin, were obtained from the leaves of Fatsia japonica DECNE et PLANCH. α-Fatsin (mp 251-253°(decomp.), [α]25D+32.2°), β1-fatsin (mp 210-215°(decomp.), [α]25D+17.6°), and β2-Fatsin (mp 239-241°(decomp.), [α]25D+16.6°) were characterized as hederagenin 3-O-β-D-glucopyranosyl (1-4)-α-L-arabinopyranoside (I), 3-O-β-D-glucopyranosyloleanolic acid (V), and hederagenin 3-O-α-L-arabinopyranoside (IX), respectively. Hydrolysis of β3-Fatsin afforded oleanolic acid and glucose, and the sapogenin of β4-Fatsin was proved to be 3β, 16α-dihydroxyolean-12-en-28-oic acid (echinocystic acid).
