Using Cc1cccc(-n2cnc(C(=O)N3CCN[C@@H](C)C3)n2)c1, O=C(O)c1cc(Br)c(Br)o1 to produce Cc1cccc(-n2cnc(C(=O)N3CCN(C(=O)c4cc(Br)c(Br)o4)[C@@H](C)C3)n2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.