The chemical Tofacitinib citrate has a designated molecular formula of C22H28N6O8 and a molecular weight of 504.500 g/mol. Synonyms may include: Tasocitinib citrate, CP-690,550-10, UNII-O1FF4DIV0D, Xeljanz, CP-690550 citrate, Xeljanz Xr (ChemID). Tofacitinib citrate has been assigned a MeSH pharmacological action of: Protein Kinase Inhibitor.