Using [NH4+], CCOC(=O)C(OC(=O)c1c(F)cccc1F)C(=O)c1ccc(OC)cc1 to produce CCOC(=O)c1oc(-c2c(F)cccc2F)nc1-c1ccc(OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.