Abstract: Six constituents were isolated from the roots of Sageretia gracilis Dunn et Spr., a anti-tumor plant in Yunnan. On the basis of spectrometric analysis (IR. NMR. MS.) and preparation of derivatives, five of them were identified as hordenine (I), syringic acid (), vanillic acid (), 6-sitosterol and palmitic acid. The anti-tumor activity of hordenine (I) is explemented as 50.5% for S 180.

Key words: chemical, pharmacologic sageretia