Using COc1cc2c(c([N+](=O)[O-])c1O)C(=O)OC2=O to produce O=C1OC(=O)c2c1cc(O)c(O)c2[N+](=O)[O-], please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.