The three alkaloids obtained from this member of N.O. Anonaceœ are found to belong to the aporphine group and are thus similar in structure to those of related botanical orders. Artabotrine, C20H 23O4N, is probably 10-hydroxy-4:5:6-trimethoxyaporphine, and suaveoline 4:10-dihydroxy-5:6-dimethoxyaporphine. The aliphatic 10-hydroxy-group is a novel feature in this group of alkaloids. It is not contained in artabotrinine, C18H17O3N, a secondary base, probably 2-methoxy-5:6-methylenedioxynoraporphine and possibly identical with the methyl ether of anolobine from Asimina triloba (N.O. Anonaceœ).