Using O=S(=O)(c1ccccc1)N1CC1c1ccc(Br)cc1, O=C=Nc1ccccc1 to produce O=C1N(c2ccccc2)C(c2ccc(Br)cc2)CN1S(=O)(=O)c1ccccc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.