Sagi, Kazuyuki; Fujita, Koichi; Sugiki, Masayuki; Takahashi, Mitsuo; Takehana, Shunji; Tashiro, Kazumi; Kayahara, Takashi; Yamanashi, Masahiro; Fukuda, Yumiko; Oono, Seiji; Okajima, Akiko; Iwata, Seinosuke; Shoji, Masataka; Sakurai, Kuniya Bioorganic and Medicinal Chemistry, 2005 , vol. 13, # 5 p. 1487 - 1496