Using CCOC(=O)C1=CN(C(=O)c2ccc(F)cc2)CC(=O)c2c1[nH]c1ccccc21, OCCO to produce CCOC(=O)C1=CN(C(=O)c2ccc(F)cc2)CC2(OCCO2)c2c1[nH]c1ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.