Uchiro, Hiromi; Nagasawa, Koh; Kotake, Tomoya; Hasegawa, Daiju; Tomita, Aya; Kobayashi, Susumu Bioorganic and Medicinal Chemistry Letters, 2002, vol. 12, # 20 p. 2821 - 2824 doi: 10.1016/S0960-894X(02)00625-X