Thalictrum cultratum (Ranunculaceae), of Pakistani origin, has supplied the new bisbenzylisoquinoline alkaloids: (—)-thalmiculine (1), (—)-5-hydroxythalmine (4), (+)-thalmiculatimine (5), (—)-thalmiculimine (6), and (—)-5-hydroxythalidasine (10). © 1986, American Chemical Society. All rights reserved.