Using Nc1nonc1-c1nc2ccccc2n1CC(=O)c1ccc(Br)cc1, NO to produce Nc1nonc1-c1nc2ccccc2n1CC(=NO)c1ccc(Br)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.