Agatsuma, Tsutomu; Ogawa, Harumi; Akasaka, Kazuhito; Asai, Akira; Yamashita, Yoshinori; Mizukami, Tamio; Akinaga, Shiro; Saitoh, Yutaka Bioorganic and Medicinal Chemistry, 2002, vol. 10, # 11 p. 3445 - 3454 doi: 10.1016/S0968-0896(02)00260-2