Using BrBr, Cn1nc(-c2c(Cl)cccc2Cl)nc1-c1cccs1 to produce Cn1nc(-c2c(Cl)cccc2Cl)nc1-c1ccc(Br)s1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.