Ma, Liang; Chen, Jinying; Wang, Xuewei; Liang, Xiaolin; Luo, Youfu; Zhu, Wei; Wang, Tianen; Peng, Ming; Li, Shucai; Jie, Shi; Peng, Aihua; Wei, Yuquan; Chen, Lijuan Journal of Medicinal Chemistry, 2011 , vol. 54, # 19 p. 6469 - 6481