Alkaloids of Piper longum Linn—I

From the root of Piper longum L. two new alkaloids, piperlongumine and piperlonguminine have been isolated. Piperlongumine and piperlonguminine are shown to be N-(3,4,5-trimethoxycinnamoyl)-Δ5-piperidin-2-one and isobutylamide of piperic acid respectively.