He, Jie; Li, Dongdong; Xiong, Kun; Ge, Yongjie; Jin, Hongwei; Zhang, Guozhou; Hong, Mengshi; Tian, Yongliang; Yin, Jin; Zeng, Huihui Bioorganic and Medicinal Chemistry, 2012 , vol. 20, # 12 p. 3816 - 3827