Using O=C(O)c1ccc([N+](=O)[O-])cc1, CC(C)C(O)[C@H](C)NC(=O)OC(C)(C)C to produce CC(C)C(OC(=O)c1ccc([N+](=O)[O-])cc1)[C@H](C)NC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.