Using COc1ccc(C(O)c2ccc([N+](=O)[O-])c(OC)c2)cc1OC to produce COc1ccc(C(=O)c2ccc([N+](=O)[O-])c(OC)c2)cc1OC, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.