Using CCOC(OCC)C1C(=O)c2ccccc2OC12CCN(C(=O)OCc1ccccc1)CC2 to produce O=C1C(=CO)C2(CCN(C(=O)OCc3ccccc3)CC2)Oc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.