Using O=S(=O)(O)Cl, COc1ccc(S(=O)(=O)C(C)C)cc1 to produce COc1ccc(S(=O)(=O)C(C)C)cc1S(=O)(=O)Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.