Using CCOC(C)=O, CCOCCn1c(C2CCN(CCc3ccc(C(C)(C)C4=NC(C)(C)CO4)cc3)CC2)nc2ccccc21 to produce CCOCCn1c(C2CCN(CCc3ccc(C(C)(C)C(=O)O)cc3)CC2)nc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.