Using O=C([O-])[O-], CCOC(=O)C1=CN(C(=O)c2ccc(F)cc2)CCc2c1[nH]c1c(O)cccc21 to produce CCOC(=O)C1=CN(C(=O)c2ccc(F)cc2)CCc2c1[nH]c1c(OC)cccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.