A new aporphine alkaloid, praecoxine (1), was isolated from the root of Parabenzoin praecox (SIEB. et ZUCC.) NAKAI. The alkaloid was shown to be identical with N-methylhernagine, (S)-(+)-1, 2, 11-trimethoxy-10-hydroxyaporphine (1), on the basis of chemical transformations and spectral evidence. The occurrence of nandigerine (10) in the root and the stem wood was also proved.
从 Parabenzoin praecox (SIEB. et ZUCC.) NAKAI 的根中分离出一种新的卟吩
生物碱,即 praecoxine (1)。根据
化学变化和光谱证据,证明该
生物碱与 N-甲基
马钱子碱、(S)-(+)-1, 2, 11-
三甲氧基-10-羟基
吗啡(1)相同。根部和茎木中含有的 nandigerine(10)也得到了证实。