Using COC(=O)[C@@H]1CCCN1, O=C(O)CCC1CCC(=O)N1 to produce COC(=O)[C@@H]1CCCN1C(=O)CCC1CCC(=O)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.