A compound {1-ethylsulfonyl-3- [4- (7h-pyrrolo [2,3-d] pyrimidin-4-yl) -1h-pyrazol-1-yl] azetidin-3-yl} acetonitrile or its salt; jak inhibitor; pharmaceutical composition; and its use to treat rheumatoid arthritis.
A COMPOUND {1-ETHYLSULFONIL-3- [4- (7H-PYRROLO [2,3-D] PYRIMIDIN-4-I1) -1 H-PYRAZOL-1-I1] AZETHYDIN-3-IL} ACETONITRILE OR ITS SALT; JAK INHIBITOR; PHARMACEUTICAL COMPOSITION; AND ITS USE TO TREAT RHEUMATOID ARTHRITIS.