[{"from": "human", "value": "Provide a description of this molecule. [C][C@@H1][C][C][N][Branch2][Ring1][=Branch1][C][C@@H1][Ring1][=Branch1][N][Branch1][C][C][C][=N][C][=N][C][=C][Ring1][=Branch1][C][=C][N][Ring1][Branch1][C][=Branch1][C][=O][C][C][#N]"}, {"from": "gpt", "value": "The molecule is an oral, small molecule inhibitor of Janus kinases that is used to treat moderate-to-severe rheumatoid arthritis, psoriatic arthritis and inflammatory bowel disease. Tofacitinib is associated with transient and usually mild elevations in serum aminotransferase levels during therapy, but has yet to be linked to cases of clinically apparent acute liver injury."}]