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