英文别名4-[1-[3-(cyanomethyl)-1-(ethylsulfonyl)-3-azetidinyl]-1H-pyrazol-4-yl]-7H-Pyrrolo[2,3-d]pyrimidine-7-carboxylic acid 1,1-dimethylethyl ester; Baricitinib Impurity 37; Baricitinib impurity 39; Baricitinib Impurity 89; 7H-Pyrrolo[2,3-d]pyrimidine-7-carboxylic acid, 4-[1-[3-(cyanomethyl)-1-(ethylsulfonyl)-3-azetidinyl]-1H-pyrazol-4-yl]-, 1,1-dimethylethyl ester; 4-(1-(3-(Cyanomethyl)-1-(ethylsulfonyl)-3-azetidinyl)-1h-pyrazol-4-yl)-7h-pyrrolo[2,3-d]pyrimidine-7-carboxylic acid tert-butyl ester 
