Numata, Tatsuo; Itoh, Osamu; Yoshimura, Toshiaki; Oae, Shigeru
Bulletin of the Chemical Society of Japan, 1983 , vol. 56, # 1 p. 257 - 265

Takeda Chemical Industries, Ltd.
Patent: EP1422228 A1, 2004 ;
Location in patent: Page 202 ;
EP 1422228 A1