[{"from": "human", "value": "Please suggest some possible reagents that could have been used in the following chemical reaction. [C][O][C][=C][C][=C][C][=C][Ring1][=Branch1].[O][=C][Branch1][C][Cl][C][C][=C][C][=C][Branch1][C][Br][C][=C][Ring1][#Branch1]>>[C][O][C][=C][C][=C][Branch1][P][C][=Branch1][C][=O][C][C][=C][C][=C][Branch1][C][Br][C][=C][Ring1][#Branch1][C][=C][Ring1][S]"}, {"from": "gpt", "value": "[Cl].[Al+3].[Cl-1].[Cl-1].[Cl-1]"}]