Using O=S(Br)Br, OC(Cn1cncn1)(c1ccc(Cl)cn1)c1ccc(Cl)cc1Cl to produce Clc1ccc(C(Br)(Cn2cncn2)c2ccc(Cl)cc2Cl)nc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.