Using O=C(O)C1CN(C(=O)OCc2ccc([N+](=O)[O-])cc2)CCN1, O=N[O-] to produce O=NN1CCN(C(=O)OCc2ccc([N+](=O)[O-])cc2)CC1C(=O)O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.