Using O=C(O)CC(=O)O, COc1cc(C=O)cc([N+](=O)[O-])c1O to produce COc1cc(C=CC(=O)O)cc([N+](=O)[O-])c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.