Using O=C(O)c1ccc([N+](=O)[O-])cc1, CC(=O)c1ccc(CC(N)C(=O)O)cc1N to produce CC(=O)c1ccc(CC(NC(=O)c2ccc([N+](=O)[O-])cc2)C(=O)O)cc1N, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.