ALKALOIDS FROM STEPHANIA SUCCIFERA H. S. LO ET Y-TSOONG

Eight alkaloids were isolated from Stephania succifera H. S. Lo et Y-Ts0ong. Alkaioids Ⅰ, Ⅱ, Ⅲ, Ⅳ and Ⅷ were identified as dehydrocrebanine, (1)-tetrahydropalmatine, crebanine, schefferine and asimilobine respectively. Schefferine, and asimilobine were first reported to occur in Stephania genus. Alkaloid Ⅶ was shown to be crebanine N- oxide on the basis of spectroscopic dataand chemical evidence. The structure elucidation of alkaloids Ⅴ and Ⅵ is still underway.