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