[{"from": "human", "value": "Based on the given chemical reaction, can you propose some likely reagents that might have been utilized? [C][C][I].[O][C][=C][C][Branch1][C][O][=C][C][Branch1][C][Br][=C][Ring1][Branch2]>>[C][C][O][C][=C][C][Branch1][C][O][=C][C][Branch1][C][Br][=C][Ring1][Branch2]"}, {"from": "gpt", "value": "[H-1].[Li+1]"}]