Sesquiterpene polyol esters from Celastrus rosthornianus

Two new sesquiterpene polyol esters with β-dihydroagarofuran skeleton were isolated from the root bark of Celastrus rosthornianus. Their structures were elucidated, mainly on the basis of spectral analyses, as 1 β-acetoxy-8β,9-dibenzoyloxy-6-hydroxy-2β(-methylbutanoyloxy)-β-dihydroagarofuran and 1β-acetoxy-9-benzoyloxy-8β-(β-furanocarbonyloxy)-6-hydroxy-2β(-methylbutanoyloxy)-β-dihydroagarofuran. The complete assignments of ¹³C NMR chemical shifts for both compounds on the basis of ¹H-¹³C chemical-shift correlation spectrum were also carried out.