Using C=C(C)C1NC(=O)CC(c2cc(Cl)ccc2C(=O)OC)C12C(=O)Nc1cc(Cl)ccc12 to produce C=C(C)C1NC(=O)CC(c2cc(Cl)ccc2C(=O)O)C12C(=O)Nc1cc(Cl)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.