Zhou, Yunyun; Feng, Qi; Di, Fengjuan; Liu, Qiaoxiao; Wang, Duoyi; Chen, Youwei; Xiong, Lixia; Song, Haibin; Li, Yuxin; Li, Zhengming Bioorganic and Medicinal Chemistry, 2013 , vol. 21, # 17 p. 4968 - 4975