Two new alkaloids, named isohyperectine and leptocarpine, were isolate
d from the whole plants of Hypecoum leptocarpum, along with the eight
known alkaloids, dihydrosanguinarine, 8-acetonyldihydrosanguinarine, 8
-methoxydihydrosanguinarine, oxohydrastinine, allocryptopine, protopin
e, hyperectine and corydamine. All structures were determined by spect
roscopic methods.