Using CNc1ncc(C2(c3ccc(Cl)cc3)OCCO2)cc1C(O)c1cccc(OC)c1 to produce CNc1ncc(C2(c3ccc(Cl)cc3)OCCO2)cc1C(=O)c1cccc(OC)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.