[{"from": "human", "value": "Provide a description of this molecule. [C][=C][Branch1][=N][C][=Branch1][C][=O][N][C][=Branch1][C][=O][N][Ring1][Branch2][I]"}, {"from": "gpt", "value": "The molecule is a halogenated pyrimidine analog containing an iodine atom linked to a pyrimidine ring. 5-Iodouracil (IU) gets incorporated into DNA. IU is a metabolite of idoxuridine (IUdR; 5-iododeoxyuridine) and the IUdR prodrug ropidoxuridine (IPdR)."}]