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 dinners into different stereochemical subgroups. (C) 2001 Elsevier Science B.V. All rights reserved.