New sesquiterpene esters from Euonymus europaeus and E. latifolius

Abstract
Ten new sesquiterpenoid esters based on the dihydroagarofuran moiety, viz.(16), (28), (29), (30a), (30b), (31), (32), (36), (37), and (40), have been isolated from Euonymus europaeus and E. latifolius in addition to three known compounds (10), (14), and (15). Structures of the isolated compounds were deduced from 1D and 2D COSY and NOESY 1H n.m.r. and mass spectral data.