Using CN1CCN(c2nn(S(=O)(=O)c3ccccc3)c3ccc(Br)cc23)CC1 to produce CN1CCN(c2n[nH]c3ccc(Br)cc23)CC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.