[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [C][C][C][C@@H1][Branch1][C][N][C][=Branch1][C][=O][O].[C][O]>>[C][C][C][C@@H1][Branch1][C][N][C][=Branch1][C][=O][O][C]"}, {"from": "gpt", "value": "[O][=S][Branch1][C][Cl][Cl]"}]