Using CC(=O)OC(CC(=O)N1CCOCC1)C(=O)O, CC(=O)O[C@@H](CC(=O)O)C(=O)N1CCOCC1 to produce COC(=O)C[C@H](O)C(=O)N1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.