Tanaka, Masakazu; Imai, Masanori; Fujio, Masakazu; Sakamoto, Eishi; Takahashi, Miyuki; Eto-Kato, Yasuko; Wu, Xiao Ming; Funakoshi, Kazuhisa; Sakai, Kiyoshi; Suemune, Hiroshi Journal of Organic Chemistry, 2000 , vol. 65, # 18 p. 5806 - 5816