Lupane triterpenes from the leaves of the tropical rain forest tree Hopea odorata Roxb. and their cytotoxic activities

► Eight lupane triterpenes were isolated from Hopea odorata. ► 3,30-dioxolup-20(29)-en-28-oic acid (6) was isolated for the first time from a natural source. ► Compounds 3-5, 7 and 8 are reported for the first time from the subfamily Dipterocarpoideae. ► Lupanes 3-8 may be considered as useful chemotaxonomic markers of the plant.