Konno, Mitoshi; Nakae, Takahiko; Sakuyama, Shigeru; Odagaki, Yoshihiko; Nakai, Hisao; Hamanaka, Nobuyuki Bioorganic and Medicinal Chemistry, 1997, vol. 5, # 8 p. 1621 - 1647 doi: 10.1016/S0968-0896(97)00090-4