3-Oxolup-20(29)-en-30-al, a new lupane from Gymnosporia emarginata(Celastraceae)

Abstract
The stem bark of Gymnosporia emarginata(Willd.) Hook f. ex. Thw. (Celastraceae) contains a number of triterpenes including a new oxygenated lupane, 3-oxolup-20(29)-en-30-al (1) and two related lupanes, 3β-hydroxylup-20(29)-en-30-al (2) and 30-hydroxylup-20(29)-en-3-one (3). The structures of these compounds have been established by spectroscopic and chemical methods.