1. Xie Bin, Li Li, Cai Shangda, Cai Fuchou, and Liu Dongmei, Acad. J. Guangdong College Pharm., 11 (3), 141 (1995).
2. Zeng Xiang-zhou, Fu Jian, Kuang Shao-yi, and Wang Shixiong, Trop. Med., 2 (4), 447 (2002).
3. FuJian, Kuang Shao-yi, and Wang Shi-xiong, Nat. Sci. J. Hainan Univ., 20 (2), 154 (2002).
4. Yao Sumei, Chin. J. Pract. Chin. Mod. Med., 2 (15), 984 (2002).
5. M. Kobaisy, M. R. Tellez, F. E. Dayan, and S. O. Duke, Phytochemistry, 61, 37 (2002).