2055723-13-0 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 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