Abstract
Celastrus species, such as Celastrus angulatus, has been demonstrated to be very rich in natural sesquiterpene polyol esters sharing the β-dihydroagarofuran skeleton, some of which showed various biological activities. In this paper, four new sesquiterpene polyol esters, named as angulatins K-N (1–4), along with three known ones, 1β-acetoxy-9β-benzoxy-4α, 6α-dihydroxy-8α, 15-diisobutanoyloxy-2β-(α-methyl)-butanoyloxy-β-dihydroagarofuran, angulatin A, and celangulin III, were isolated from the root bark of C. angulatus. The structures of the new compounds were elucidated by extensive spectroscopic methods, mainly including HR-MS and 1D and 2D NMR techniques.
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