Triterpenoids from Cassine xylocarpa and Celastrus vulcanicola (Celastraceae)

► Two new triterpenoids from two Salvadorean Celastraceae species. ► Xyloketal, first example of 3,25-epoxy-olean-12-ene from Celastraceae. ► Molecular mechanic calculations for xyloketal and its epimer. ► A new glutinane-type triterpene, 3β,21α-dihydroxyglut-5-ene.