Using O=c1[nH]c2cc(-c3cccc([N+](=O)[O-])c3)nn2c2ccccc12 to produce Nc1cccc(-c2cc3[nH]c(=O)c4ccccc4n3n2)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.