Using CC1(C)CNCCN1C(=O)c1ncn(-c2cccc(Cl)c2)n1, O=C(O)c1cccc(Br)n1 to produce CC1(C)CN(C(=O)c2cccc(Br)n2)CCN1C(=O)c1ncn(-c2cccc(Cl)c2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.