Gorohmaru, Hideki; Thiemann, Thies; Sawada, Tsuyoshi; Takahashi, Kazufumi; Nishi-I, Katsumi; Ochi, Naoko; Kosugi, Yoshio; Mataka, Shuntaro
Heterocycles, 2002 , vol. 56, # 1-2 p. 421 - 431