Separation of the alkaloids from Corydalis ochotensis yielded six new isoquinoline alkaloids, raddeanamine (1), raddeanine (2). raddeanidine (3), raddeanone (4). aobamine (5). and aobamidine (6), along with the known alkaloids protopine (7), adlumidine (8), bicuculline (9), dihydrosanguinarine (10). ochotensimine (11), ochotensine (12). cheilanthifoline (13). scoulerine (14). sinoacutine (15). and pallidine (16). © 1977, Royal Society of Chemistry.