Allantoin from the leaves of Pisonia grandis R.Br.

Abstract

Phytochemical investigation of the leaves of the Pisonia grandis afforded three compounds (1-3). Compound 1 was identified as the insulin mimetic molecule pinitol and its isolation was reported in our earlier paper¹. The present paper deals with the isolation of compounds 2 and 3, whose structures were established as that of allantoin and its hydrogen bonded isomeric crystalline form, based on spectroscopic data and it is the first report of isolation of allantoin and its hydrogen bonded isomer from Pisonia genus and from this species.