Abstract:The chlorofrom or ethyl acctate extract of the roots of QING-YANG-SHEN (Cynanchum otophyllum Schneid. ) which is collected in Yunnan province, has been shown to prosses therpeutic activity for epilepsy and chronic hepatitis. We have identifie, constituieuts as follows pallmitic acid methyl ester, β-sitosterol, vailillic acid and rostratamine.