Using O=C1CCC(=O)N1Br, Cc1ccc2c(-c3ccc(F)cc3)cc(=O)oc2c1 to produce O=c1cc(-c2ccc(F)cc2)c2ccc(CBr)cc2o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.