Using COc1cc(CCc2cnc3c(ccn3S(=O)(=O)c3ccccc3)n2)cc(OC)c1, ClC(Cl)(Br)C(Cl)(Cl)Br to produce COc1cc(CCc2cnc3c(cc(Br)n3S(=O)(=O)c3ccccc3)n2)cc(OC)c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.