1. Dictionary of Chinese Crude Drugs, in: Chinese, Chiang Su New Medicinal College, Ed. Shanghai Scientific Technologic Publisher, Shanghai, 2003, p. 2631.
2. Huang Baokang, Zheng Hanchen, Qin Luping, Zheng Qinming, and Xin Hailiang, J. Chin. Med. Mater., 27, No. 9, 632 (2004).
3. Chen Hubiao, Zhu Jianmin, Zhao Yuying, and Yan Benhou, Chin. Trad. Pat. Med., 21, No. 12, 652 (1999).
4. Chen Hubiao and Cheng Jingron, Bull. Bot. Res., 11, No.3, 29 (1991).
5. P. W. Thies, Tetrahedron, 24, No.1, 313 (1968).