[{"from": "human", "value": "Given the following reaction, what are some possible reagents that could have been utilized? [O][=S][Branch1][C][Cl][Cl].[O][C][C][=C][C][Branch1][C][Br][=C][C][=C][Ring1][#Branch1][I]>>[Cl][C][C][=C][C][Branch1][C][Br][=C][C][=C][Ring1][#Branch1][I]"}, {"from": "gpt", "value": "[Cl][C][Cl]"}]