Using COC(=O)[C@@H]1CCCN1, O=C1OC(=O)C2=C1CCC2 to produce COC(=O)[C@@H]1CCCN1C(=O)C1=C(C(=O)O)CCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.