Using CCOC(=O)Cn1[nH]c(=O)c2cc([N+](=O)[O-])ccc21 to produce O=C(O)Cn1[nH]c(=O)c2cc([N+](=O)[O-])ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.