Abstract: The Hleat xib nenb is the root of Celastrus hypoleucus(Oliv.)Warb.ex Loes., widely distributed in China, has been used in the treatment of inflammation and detumescence. Six compounds(1-6) were isolated from the roots of H. xib nenb. Among them compound 1 is a novel compound. Its structure was characterized and identified by spectral method(especially by 2D NMR) to be 29-methoxyfriedelan-3-one.