[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [C][N][Branch1][C][C][C][C][O][C][=C][C][=C][Branch1][C][Br][C][=C][Ring1][#Branch1][N+1][=Branch1][C][=O][O-1]>>[C][N][Branch1][C][C][C][C][O][C][=C][C][=C][Branch1][C][Br][C][=C][Ring1][#Branch1][N]"}, {"from": "gpt", "value": "[C][C][C][O][C][Ring1][Branch1].[O].[Cl-1].[NH4+1].[Zn]"}]