Sesquiterpenoids and their glycosides from Gynura procumbens

Chemical investigation of the MeOH extract of the leaves of Gynura procumbens (Lour.) Merr. afforded one new sesquiterpenoid, muurol-4-ene-1 beta,3 beta,10 beta-triol (1), and two sesquiterpene glycosides, muurol-4-ene-1 beta,3 beta,10 beta-triol 3-O-beta-D-glucopyranoside (2) and muurol-4-ene-1 beta,3 beta,15-triol 3-O-beta-D-glucopyranoside (3), together with three known sesquiterpenoids. Their structures were elucidated on the basis of spectroscopic analyses and chemical methods.