FMC Corporation
Patent: US4426524 A1, 1984 ;

Shin, Chung-Gi; Yamada, Yasuhiro; Hayashi, Keiichiro; Yonezawa, Yasuchika; Umemura, Kazuyuki; Tanji, Tsuyoshi; Yoshimura, Juji
Heterocycles, 1996 , vol. 43, # 4 p. 891 - 898

FMC Corporation
Patent: US4426524 A1, 1984 ;