Shimono, Satoshi; Tamura, Rui; Ikuma, Naohiko; Takimoto, Tatsuya; Kawame, Naoyuki; Tamada, Osamu; Sakai, Naoko; Matsuura, Hiroaki; Yamauchi, Jun Journal of Organic Chemistry, 2004 , vol. 69, # 2 p. 475 - 481