[{"from": "human", "value": "Please propose potential reagents that might have been utilized in the provided chemical reaction. [C][C][Branch1][C][C][C][C@H1][Branch1][C][N][C][=Branch1][C][=O][O].[C][C][Branch1][C][C][O]>>[C][C][Branch1][C][C][C][C@H1][Branch1][C][N][C][=Branch1][C][=O][O][C][Branch1][C][C][C]"}, {"from": "gpt", "value": "[O][=S][Branch1][C][Cl][Cl]"}]