Abstract: Spondias pinnata of Anacardiaceae is distributed in the tropics of China,India,Sri Lanka and South-East Asian countries.The stem barks are used in folk medicine for the treatment of diarrhea,dysentery,rheumatism,gonorrhea and tubercular.The chemical constituents of S.pinnata collected at Mengxing,Mengla,Yunnan,China were isolated by column chromatography on silica gel,MCI and Sephadex LH-20 and identified by chemical and spectral analysis.Eleven compounds were finally isolated and purified from stem barks of S.pinnata. Their structures were elucidated as friedelin (1),glut-5-en-3-ol (2),friedelinol (3),24-methylenecycloartanol (4),(10Z)-heptadec-10-en-1-ol (5),octacosanol (6),1-triacontanol (7),phthalate (2-ethyl-hexyl) ester (8),2,6-dihydroxy-3,4-dimethylbenzoic acid methyl ester (9), daucosterol (10),sitosterol (11).Compounds 1~9 were obtained from this plant for the first time.

Key words: Anacardiaceae, Spondias pinnata, stem barks, chemical constituents