Shirahata, Tatsuya; Sunazuka, Toshiaki; Yoshida, Kiminari; Yamamoto, Daisuke; Harigaya, Yoshihiro; Kuwajima, Isao; Nagai, Takayuki; Kiyohara, Hiroaki; Yamada, Haruki; Omura, Satoshi Tetrahedron, 2006, vol. 62, # 40 p. 9483 - 9496 doi: 10.1016/j.tet.2006.06.088