Abstract: Eleven tertiary alkaloids were isolated from Corvdalis decumbens rhizome Their structures were identified as protopine (VII), allocryptopine (VIII), cryptopine (IX), muramine (XVII); (+)-tetrahydropalmatine (Ⅲ), (+)-kikemanine (IV), (-)-scoulerine (XVIII), (-)-bulbocapnine (XIX), and (-)-capnoidine (I), (-)-bicuculline(V), (+) coriumidine (XIV), respectively. Among these, cryptopine, muramine, (+)-kikemanine, (-)-scoulerine, (-)capnoidine, (-)-bicuculline were isolated for the first time from this plant.

Key words: Corydalis deculnbeng, Tertiary alkaloids, (+)-kikemanine, (-)-scoulerine, Muramine