[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [C][C][N][=C][=O].[N][#C][C][=C][C][=C][Branch1][C][O][C][Branch1][C][N][=C][Ring1][Branch2]>>[C][C][N][C][=Branch1][C][=O][N][C][=C][C][Branch1][Ring1][C][#N][=C][C][=C][Ring1][Branch2][O]"}, {"from": "gpt", "value": "[C][C][#N]"}]