Sesquiterpene polyol esters from Celastrus flagellaris

Two new β-dihydroagarofuran sesquiterpene polyol esters named celastrine A (1) and celastrine B (2), as well as three known sesquiterpenes (3−5), were isolated from the seed oil of Celastrus flagellaris. Their structures were elucidated as 1α,6β,8α,13-tetraacetoxy-9α-(benzoyloxy)-β-dihydroagarofuran (1) and 1α-acetoxy-2α,9β-bis(cinnamoyloxy)-β-dihydroagarofuran (2) on the basis of spectroscopic evidence.