Using Cn1ccc(Nc2ncnc3ccc(O)cc23)n1, O=[N+]([O-])c1ccc(Br)cn1 to produce Cn1ccc(Nc2ncnc3ccc(Oc4ccc([N+](=O)[O-])nc4)cc23)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.