Using CCCc1ccc(CS(=O)(=O)c2ccccc2)c(C(=O)OCC)c1OC to produce CCCc1ccc(CS(=O)(=O)c2ccccc2)c(C(=O)O)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.