[{"from": "human", "value": "What reagents could have been utilized in the following chemical reaction? [C][C][=C][C][Branch1][C][Cl][=C][C][Branch1][Ring1][C][O][=C][Ring1][=Branch2][N]>>[C][C][=C][C][Branch1][C][Cl][=C][C][Branch1][Ring1][C][=O][=C][Ring1][=Branch2][N]"}, {"from": "gpt", "value": "[C][C][C][O][C][Ring1][Branch1].[Cl][C][Cl].[Mn+4].[O-2].[O-2]"}]