[{"from": "human", "value": "Based on the given chemical reaction, can you propose some likely reagents that might have been utilized? [C][O][C][=Branch1][C][=O][C][=C][C][=C][Branch1][C][I][C][Branch1][C][Br][=C][Ring1][Branch2]>>[O][C][C][=C][C][=C][Branch1][C][I][C][Branch1][C][Br][=C][Ring1][Branch2]"}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C][AlH1][C][C][Branch1][C][C][C].[Cl][C][Cl].[O]"}]