[{"from": "human", "value": "Based on the given chemical reaction, can you propose some likely reagents that might have been utilized? [C][C][C][=N][N][C][Branch1][C][Br][=C][C][=C][C][Ring1][#Branch1][=C][Ring1][#Branch2][N+1][=Branch1][C][=O][O-1]>>[C][C][C][=N][N][C][Branch1][C][Br][=C][C][=C][C][Ring1][#Branch1][=C][Ring1][#Branch2][N]"}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][O].[C][C][O].[O].[Zn]"}]