Using O=C(NC1(C(=O)O)CCCCC1)N1CCOCC1, CCCC[C@H](N)C(O)C(=O)OCc1ccccc1 to produce CCCC[C@H](NC(=O)C1(NC(=O)N2CCOCC2)CCCCC1)C(O)C(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.