tofacitinib rheumatoid arthritis drug molecule. inhibitor of janus kinase 3 (jak3). atoms are represented as spheres with

tofacitinib tasocitinib tafocitinib janus kinase jak inhibitor rheumatoid arthritis psoriasis inflammatory bowel disease immunological immunology organ transplant rejection jak3 jakstat signaling pathway hydrogen carbon nitrogen oxygen drug therapy medicine medicinal product pharmacology pharmacy pharmaceutical pharma treatment generic molecule atoms chemical chemistry composition atomic model molecular