Orito, Kazuhiko; Miyazawa, Mamoru; Nakamura, Takatoshi; Horibata, Akiyoshi; Ushito, Harumi; Nagasaki, Hideo; Yuguchi, Motoki; Yamashita, Satoshi; Yamazaki, Tetsuro; Tokuda, Masao Journal of Organic Chemistry, 2006 , vol. 71, # 16 p. 5951 - 5958