Ito, Shunji; Nomura, Akiko; Morita, Noboru; Kabuto, Chizuko; Kobayashi, Hirokazu; Maejima, Seiko; Fujimori, Kunihide; Yasunami, Masafumi Journal of Organic Chemistry, 2002 , vol. 67, # 21 p. 7295 - 7302