[{"from": "human", "value": "Given this chemical reaction, what are some reagents that could have been used? [C][C][O][C][=Branch1][C][=O][C][C][C][Br].[C][C@H1][C][C][C][N][Ring1][Branch1]>>[C][C][O][C][=Branch1][C][=O][C][C][C][N][C][C][C][C@@H1][Ring1][Branch1][C]"}, {"from": "gpt", "value": "[C][C][C][Branch1][C][C][=O].[Cl].[O][=C][Branch1][C][O-1][O-1].[K+1].[K+1]"}]