Using O=C([O-])[O-], C=C1c2cc(Br)ccc2Oc2c1cc(OCC(C)(C)C)nc2F to produce CC(C)(C)COc1cc2c(c(F)n1)Oc1ccc(Br)cc1C21CO1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.