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Chemical constituents of the dried aerial parts of Euphorbia nematocypha were investigated. A new oleanane triterpenoid, trans, trans-2′,4′-hexadienedioicacid-1′-β-amyrin ester (1), together with, β-amyrin (2), β-amyrin acetate (3), betulinic acid (4), ellagic acid (5), oleanolic acid (6), β-sitosterol (7), kaempferol (8), quercetin (9), lupeol (10) and pseudo-taraxasterol (11) were isolated from the methylene chloride extract. Their structures were elucidated on the basis of extensive spectroscopic (1D- &amp; 2D-NMR) and ESI-MS analysis and comparison with data reported in the literature. The new isolated triterpenoid showed moderate cytotoxic activities against HeLa and MCF-7cell lines.

Chemical Constituents of the Aerial Parts of Euphorbia Nematocypha