Using O=C([O-])CCOC(c1ccccc1)(c1ccccc1)c1ccccc1, O=C(Cl)C(=O)Cl to produce O=C(Cl)CCOC(c1ccccc1)(c1ccccc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.