1. R. Lin, D. J. Yu, and Z. Y. Wu, Flora of China, Beijing, Science Press, 1989, p. 263–265.
2. Jiangsu New Medical College, Dictionary of Traditional Chinese Materia Medica, Shanghai Peoples Press, Shanghai, 1977, 2, pp. 2216–2219.
3. D. Bensky, A. Gamble, T. J. Kaptchuk, and I. L. Bensky, Chinese Herbal Medicine: Materia Medica, Eastland Press, Seattle, 1993, pp. 193–194.
4. R. W. Doskotch, C. D. Hufford, and F. S. El-Feraly, J. Org. Chem., 37, 2740 (1972).
5. Q. Wang, B. N. Zhou, R. W. Zhang, Y. Y. Lin, L. Z. Lin, R. R. Gil, and G. A. Cordell, Planta Med., 62, 166 (1996).