References
- Zhang , Z.X. 1983 . J. Zhou. Acta Chim. Sin. , 41 : 1058
- Zhang , Y.H. , Wen , Y.Y. and Kuang , T.T. 2000 . Tianran Chanwu Yanjiu Yu Kaifa , 12 : 83
- Yeo , H. , Kim , K.W. , Kim , J. and Choi , Y.H. 1998 . Phytochemistry , 49 : 1129
- Tsutomu , W. and Tadakata , N. 2003 . Chem. Pharm. Bull. , 51 : 1036