Using COCCOCN1C(C)=C(C(=O)OC)C(c2cccc([N+](=O)[O-])c2)C(C(=O)OC)=C1C to produce COCCOCN1C(C)=C(C(=O)O)C(c2cccc([N+](=O)[O-])c2)C(C(=O)OC)=C1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.