[{"from": "human", "value": "Provide a description of this molecule. [C][C][C][C][=C][C][=Branch1][C][=O][N][C][=Branch1][C][=S][N][Ring1][Branch2]"}, {"from": "gpt", "value": "The molecule is a thiourea derivative with antithyroid property. Propylthiouracil (PTU) interferes with the oxidation of iodine possibly by interaction with peroxidase or a peroxidase-mediated complex reaction, thereby inhibiting synthesis of thyroid hormones tri-iodothyronine (T3) and thyroxine (T4). In addition, this agent inhibits the Type I 5'-deiodinase (D1), an enzyme involved in the peripheral conversion of thyroxine to tri-iodothyronine. This results in decreased plasma triodothyronine concentrations and decreased entrance of thyroxine into cells thereby reducing thyroid hormone activity."}]