[{"from": "human", "value": "What can you tell me about this molecule? [C][C][C][=C][Branch1][=N][C][=Branch1][=Branch2][=N][C][=Branch1][Ring2][=N][Ring1][=Branch1][N][N][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][Cl]"}, {"from": "gpt", "value": "The molecule is an antiparasitic prescription medicine approved by the U.S. Food and Drug Administration (FDA) for the treatment of Toxoplasma gondiiinfection (toxoplasmosis). Pyrimethamine is usually used together with a sulfonamide (sulfa medicine) to treat toxoplasmosis."}]