Using O=C1c2ccccc2C(=O)c2c1ccc(C(=O)O)c2[N+](=O)[O-] to produce Nc1c(C(=O)O)ccc2c1C(=O)c1ccccc1C2=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.