[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [C][O].[O][=C][Branch1][C][O][C][C][C][C][C][N][Ring1][=Branch1]>>[C][O][C][=Branch1][C][=O][C][C][C][C][C][N][Ring1][=Branch1]"}, {"from": "gpt", "value": "[C][C][O][C][C].[C][O-1].[O][=S][Branch1][C][Cl][Cl].[Na+1]"}]