Megastigmane glycosides from seeds of Trifoliumalexandrinum

Abstract

Five megastigmane glycosides have been isolated from the seeds of Trifoliumalexandrinum L., of which two are known compounds, while three are new compounds showingthe presence of apiofuranosyl- (1→2)-glucopyranosyl residue as a sugar moiety. The structures ofthe isolated compounds were established on the basis of NMR and mass spectral data.