Using Cc1ccc(Cl)cc1-c1nc(Cl)nc(Nc2ccc(Br)cc2)n1, C[S-] to produce CSc1nc(Nc2ccc(Br)cc2)nc(-c2cc(Cl)ccc2C)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.