Abstract
Two new macrocyclic diterpenes, 2-epi-latazienone (4) and 15β-acetoxy-7β-nicotinoyloxy-3β,8α-di-(2-methylpropanoyloxy)-4αH,9αH,l1αH-lathyra- 5E,12E-dien-14-one (5), and three known lathyrane-type diterpenes (1-3) were isolated from Euphorbia laurifolia latex. Their structures were determined on the basis of a detailed analysis of their 1D and 2D NMR spectroscopic and mass spectral data.
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