Using Nc1ncc(Br)nc1NCc1ccc2ncc(Br)cc2c1, O=N[O-] to produce Brc1cnc2ccc(Cn3nnc4ncc(Br)nc43)cc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.