Chern, Ji-Wang; Leu, Yu-Ling; Wang, Shan-Shue; Jou, Ruwen; Lee, Chin-Fen; Tsou, Pei-Chie; Hsu, Shih-Chung; Liaw, Yen-Chywan; Lin, Hua-Mei Journal of Medicinal Chemistry, 1997 , vol. 40, # 14 p. 2276 - 2286