[{"from": "human", "value": "Could you 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 Thyroid Hormone Synthesis Inhibitor. The mechanism of action of propylthiouracil is as a Thyroid Hormone Synthesis Inhibitor."}]