[{"from": "human", "value": "Describe this molecule. [C][/C][=Branch2][Ring1][=N][=C][Branch1][Ring1][\\C][#N][/C][=Branch1][C][=O][N][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][Branch1][C][F][Branch1][C][F][F][/O]"}, {"from": "gpt", "value": "The molecule is the active metabolite of leflunomide, and it acts as an immunomodulatory agent by inhibiting pyrimidine synthesis. It is marketed under the name Aubagio\u00ae and is indicated for the treatment of multiple sclerosis, specifically relapsing forms. The FDA label states an important warning about the risk of hepatoxicity and teratogenicity for patients using teriflunomide."}]