Chen, Yi-Hua; Zhang, Ya-Hui; Zhang, Hua-Jie; Liu, Da-Zhi; Gu, Min; Li, Jing-Ya; Wu, Fang; Zhu, Xing-Zu; Li, Jia; Nan, Fa-Jun Journal of Medicinal Chemistry, 2006 , vol. 49, # 5 p. 1613 - 1623