Using CC(C)n1c(C(Br)Br)c(-c2ccc(F)cc2)c2cccnc21, O=C([O-])[O-] to produce CC(C)n1c(C=O)c(-c2ccc(F)cc2)c2cccnc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.