Two new alkaloids, demethylmaritidine (4) and (–)-N-demethyllycoramine (5), were isolated from the bulbs of Hymenocallis rotata herb. (amaryllidaceae) together with eleven known bases, vittatine (6), alkaloid-13 (7), 3-epimacronine (8), ismine (9), pretazettine (10), lycoramine (11), lycorine (12), tazettine (13), haemanthamine (14), galanthamine (15), and N-demethylgalanthamine (16). © 1987, The Pharmaceutical Society of Japan. All rights reserved.