Neolignan and megastigmane glycosides from the leaves of Pterospermum semisagittatum

Three compounds namely, (7S,8R)-dihydrodehydrodiconiferyl alcohol-9'-O-β-D-glucopyranoside (1), 10-hydroxy-4,7-megastigmadien-3-one-9-O-β-D-glucopyranoside (2) and 9-hydroxy-4,7-megastigmadien-3-one-10-O-β-D-glucopyranoside (3) were isolated from the methanol extract of Pterospermum semisagittatum. The structures of these compounds were elucidated by spectroscopic methods. While glycosides 2 and 3 appear to be new, this is the third report of isolation of compound 1 from any natural source.