Using CCOC(=O)CC(=O)c1cc(Oc2ccccc2)c(NS(C)(=O)=O)cc1OCc1ccccc1 to produce CCOC(=O)CC(=O)c1cc(Oc2ccccc2)c(NS(C)(=O)=O)cc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.