Seto, Masaki; Aramaki, Yoshio; Okawa, Tomohiro; Miyamoto, Naoki; Aikawa, Katsuji; Kanzaki, Naoyuki; Niwa, Shin-Ichi; Iizawa, Yuji; Baba, Masanori; Shiraishi, Mitsuru Chemical and Pharmaceutical Bulletin, 2004 , vol. 52, # 5 p. 577 - 590