Tetrahydroprotoberberine and aporphine alkaloids from rollinia leptopetala.

Tetrahydrojatrorrhizine, discretamine, anonaine and roemerine were isolated from the roots of Rollinia leptopetala R. E. Fries. They were identified and characterized by nuclear magnetic resonance spectroscopy ( 1 H and 13 C) with the aid of two-dimensional techniques ( 1 H- 1 H COSY, HETCOR, HMQC and HMBC). With the exception of tetrahydrojatrorrhizine, the presence of these alkaloids in R. leptopetala has not been reported previously.