Using O=C1CCC(=O)N1Br, O=C(c1cccc(C(F)(F)F)c1Cl)N1CCn2cc(C(F)(F)F)nc2C1 to produce O=C(c1cccc(C(F)(F)F)c1Cl)N1CCn2c(nc(C(F)(F)F)c2Br)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.