Using CC(C)(C)OC(=O)N[C@@H]1CCC[C@H](C(=O)O)C1, Clc1ccc(N2CCNCC2)cc1Cl to produce CC(C)(C)OC(=O)N[C@H]1CCC[C@@H](C(=O)N2CCN(c3ccc(Cl)c(Cl)c3)CC2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.