Sankio Chemical Co., Ltd.
Patent: EP1186596 A1, 2002 ;
Location in patent: Page 10 ;

Shintou, Taichi; Ikeuchi, Fumiaki; Kuwabara, Hirokazu; Umihara, Ken; Itoh, Isamu
Chemistry Letters, 2005 , vol. 34, # 6 p. 836 - 837