Using Cc1ccc([N+](=O)[O-])cc1NCCC(=O)O, CC1(C)OC(=O)CC(=O)O1 to produce Cc1ccc([N+](=O)[O-])cc1NCCC(=O)C1C(=O)OC(C)(C)OC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.