Using O=C(Cl)c1ccc(Br)cc1, Cc1nccc(N2CCC(O)(C(=O)N3CCNCC3)CC2)n1 to produce Cc1nccc(N2CCC(O)(C(=O)N3CCN(C(=O)c4ccc(Br)cc4)CC3)CC2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.