Triterpenoid glycosides of Corchorus acutangulus Lam.

Abstract
Four new triterpenoid glycosides, corchorusins A, B, C, and D, isolated from the aerial part of Corchorus acutangulus Lam. were respectively defined as longispinogenin 3-O-β-β-D-galactopyranoside (1), saikogenin F 3-O-β-D-galactopyranoside (12), 23-hydroxylongispinogenin 3-O-β-D-galactopyranoside (6), and saikogenin E 3-O-β-D-glucopyranosyl(1→2)-β-D-galactopyranoside (15) based on their spectral properties and some chemical transformations.