Fitoterapia. 2001 Dec; 72(8): 875-86.

Two novel proaporphine-tryptamine dimers from Roemeria hybrida.

G�nes HS, GÃ¶zler B.

Ege University, Faculty of Pharmacy, Bornova 35100, Izmir, Turkey.

Roemeria hybrida yielded two novel proaporphine-tryptamine N-oxides, (-)-roehybridine alpha-N-oxide (1) and (-)-roehybramine beta-N-oxide (2). NMR data allowed a facile assignment of these proaporphine-tryptamine dimers into different stereochemical subgroups.