[{"from": "human", "value": "From the provided chemical reaction, propose some possible reagents that could have been used. [C][C][C][=Branch1][C][=O][Cl].[I][C][=C][C][=C][C][=C][Ring1][=Branch1]>>[C][C][C][=Branch1][C][=O][C][=C][C][=C][Branch1][C][I][C][=C][Ring1][#Branch1]"}, {"from": "gpt", "value": "[Cl].[S][=C][=S].[Al+3].[Cl-1].[Cl-1].[Cl-1]"}]