Using O=C([O-])[O-], CCOC(=O)c1oc2cc(O)c(CC)cc2c(=O)c1-c1ccc(F)cc1 to produce CCOC(=O)c1oc2cc(OC)c(CC)cc2c(=O)c1-c1ccc(F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.