Using CCN1CCN(C(=O)OC(C)(C)C)[C@@H](C(=O)O)C1, C1CNCCN1 to produce CCN1CCN(C(=O)OC(C)(C)C)[C@@H](C(=O)N2CCNCC2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.