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