[{"from": "human", "value": "Given the following reaction, what are some possible reagents that could have been utilized? [C][C][=Branch1][C][=O][O][C][C@@H1][C][N][C][C][C][C@H1][Ring1][Branch1][C][O][Ring1][=Branch2]>>[O][C][C@@H1][C][N][C][C][C][C@H1][Ring1][Branch1][C][O][Ring1][=Branch2]"}, {"from": "gpt", "value": "[C][C][O][C][C][O][Ring1][=Branch1].[C][O-1].[Cl].[Cl][C][Cl].[Na+1]"}]