Fukunaga, Kyoko; Yoshida, Masahiro; Nakajima, Fumio; Uematsu, Rie; Hara, Mariko; Inoue, Shintaro; Kondo, Hirosato; Nishimura, Shin-Ichiro Bioorganic and Medicinal Chemistry Letters, 2003, vol. 13, # 5 p. 813 - 815 doi: 10.1016/S0960-894X(03)00006-4