New triterpenoid sapoin from Ardisia gigantifolia Stapf.

Abstract One new triterpenoid sapoin with two known triterpenoid sapoins: 3β- O -{α- l -rhamnopyranosyl-(1 → 3)-[β- d -xylopyranose-(1 → 2)]-β- d -glucopyranosyl-(1 → 4)-α- l -arabinopyranosyl}-3β-hydroxy-13β,28-epoxy-oleanan-16-oxo-30-al ( 1 ), 3β- O -{α- l -rhamnopyranosyl-(1 → 3)-[(β- d -xylopyranosyl-(1 → 2)]-β- d -galactopyranosyl-(1 → 4)-[(β- d -glucopyranosyl-(1 → 2)]-α- l -arabinopyranoside}-16α-hydroxy-13,28-epoxy-oleanane ( 2 ) and cyclamiretin A 3β- O -α- l -rhamnopyranosyl-(1 → 3)-[β- d -xylopyranosyl-(1 → 2)]-β- d -glucopyranosyl-(1 → 4)-[β- d -glucopyranosyl-(1 → 2)]-α- l -arabinopyranoside ( 3 ) were isolated from Ardisia gigantifolia Stapf. Their structures were elucidated by means of 1 H and 13 C NMR spectroscopic studies, including 2D-NMR technique.