Using O=C(c1ccccc1)c1ccccc1S, CCCCC(C=O)(CC)COS(C)(=O)=O to produce CCCCC(C=O)(CC)CSc1ccccc1C(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.