Using CCOC(=O)C(=O)c1c[nH]c2cccc([N+](=O)[O-])c12 to produce CCOC(=O)CC1CNc2cccc([N+](=O)[O-])c21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.