Using CCCCCCCCN, CC(C)(C)OC(=O)N1CCCCC[C@H]1C(=O)O to produce CCCCCCCCNC(=O)[C@@H]1CCCCCN1C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.