Okada, Yukihiro; Yokozawa, Masanori; Akiba, Miwa; Oishi, Kazuhiko; O-Kawa, Kyoji; Akeboshi, Tomohiro; Kawamura, Yasuo; Inokuma, Seiichi; Nakamura, Yosuke; Nishimura, Jun Organic and Biomolecular Chemistry, 2003 , vol. 1, # 14 p. 2506 - 2511