Sasaki, Makoto; Ebine, Makoto; Takagi, Hiroyuki; Takakura, Hiroyuki; Shida, Takeshi; Satake, Masayuki; Oshima, Yasukatsu; Igarashi, Tomoji; Yasumoto, Takeshi Organic Letters, 2004, vol. 6, # 9 p. 1501 - 1504 doi: 10.1021/ol049569l