Using CC1(COc2ccc(O)cc2)OCCO1, O=C1OC(COc2ccccc2)CN1CCO to produce CC1(COc2ccc(OCCN3CC(COc4ccccc4)OC3=O)cc2)OCCO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.