Using CN1C(=O)Cc2ccsc2S1(=O)=O, O=C=Nc1ccc(Br)cc1 to produce CN1C(O)=C(C(=O)Nc2ccc(Br)cc2)c2ccsc2S1(=O)=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.