Using CCn1c2ccccc2c2cc(N(CC(=O)OC)S(=O)(=O)c3cc(Cl)cc(Cl)c3)ccc21 to produce CCn1c2ccccc2c2cc(N(CC(=O)O)S(=O)(=O)c3cc(Cl)cc(Cl)c3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.