英文别名PAPE-ETHYL CARBAMATE; Ethyl (4-((2-(methylcarbamoyl)pyridin-4-yl)oxy)phenyl)carbamate; PAPE-ETHYLCARBAMATE; Sorafenib Tosylate Impurity B; Sorafenib Impurity 2(PAPE-ethyl carbamate); Ethyl N-[4-[[2-[(methylamino)carbonyl]-4-pyridinyl]oxy]phenyl]carbamate; Carbamic acid, N-[4-[[2-[(methylamino)carbonyl]-4-pyridinyl]oxy]phenyl]-, ethyl ester; Sorafenib Carbamate Ethyl Ester Impurity 
