Subhashini K. SripathiLalitha, P2017-02-152017-02-152011https://ir.avinuty.ac.in/handle/avu/1397Phytochemical investigation o f the leaves o f the Pisonia grandis afforded three compounds (I-3). Compound I was identified as the insulin mimetic molecule pinitol and its isolation was reported in our earlier paper'. The present paper deals with the isolation o f compounds 2 and 3. whose structures were established as that o f allantoin and its hydrogen bonded isomeric crystalline form, based on spectroscopic data and it is the first report o f isolation of allantoin and its hydrogen bonded isomer from Pisonia genus and from this species.