Ogoshi, Tomoki; Kitajima, Keisuke; Umeda, Kenji; Hiramitsu, Sachi; Kanai, Suguru; Fujinami, Shuhei; Yamagishi, Tada-aki; Nakamoto, Yoshiaki Tetrahedron, 2009 , vol. 65, # 51 p. 10644 - 10649