Using CCOC(=O)c1ccc(-c2cc(NC(=O)C3CCCCC3)ccc2Cl)cc1 to produce O=C(O)c1ccc(-c2cc(NC(=O)C3CCCCC3)ccc2Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.