Three New Apianen lactones Compounds from Dioscorea Cirrhosa Lour

Dioscorea Cirrhosa Laour. which is a species of the Dioscorea, grows abundantly in southern and eastern China. Its roots are used in Chinese medicine as a remedy for various diseases, especially use for tumours and cancers. These results have prompted a search for its chemical constituents. Continuing out previous work,further studies on the constituents of the drug yielded three new compounds along with three known compounds in the EtOAc Fr of EtOH extraction.