Studies on constituents of Bignoniaceae plants. IV. Isolation and structure of a new iridoid glucoside, campsiside, from Campsis chinensis.

Abstract

A new iridoid glucoside, campsiside, was isolated along with 5-hydroxycampsiside (pond-raneoside) and an alkaloid, boschniakine, from Campsis chinensis. The structures of campsiside and 5-hydroxycampsiside (pondraneoside) were established as 5 and 12, respectively, from chemical and spectral evidence.