Kambe, Tohru; Maruyama, Toru; Naganawa, Atsushi; Asada, Masaki; Seki, Akiteru; Maruyama, Takayuki; Nakai, Hisao; Toda, Masaaki Chemical and Pharmaceutical Bulletin, 2011, vol. 59, # 12 p. 1494 - 1508 doi: 10.1248/cpb.59.1494