Using C[O-], COC(=O)c1cnc(Cl)c(F)c1Nc1ccc(Br)cc1F to produce COC(=O)c1cnc(OC)c(F)c1Nc1ccc(Br)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.