Using CN1CCNS1(=O)=O, O=[N+]([O-])c1ccc(CBr)cc1 to produce CN1CCN(Cc2ccc([N+](=O)[O-])cc2)S1(=O)=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.