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