Cardiac glycosides from Corchorus olitorius

Abstract

Besides identification of gluco-(1 → 6)-olitoriside and olitoriside, the structures of olitoriusin and erysimoside isolated from the seeds of Corchorus olitorius were proposed to be strophanthidin 3-O-β-D-glucopyranosyl-(1 → 6)-β-D-glucopyranosyl-(1 → 4)-β-D-digitoxoside (2) and strophanthidin 3-O-β-D-glucopyranosyl-(1 → 4)-β-D-digitoxoside (4). The structures were elucidated by a combination of fast-atom bombardment mass spectrometry, ¹³C n.m.r. spectroscopy, and some chemical transformations.