Using O=S1(=O)Nc2ccccc2N1c1ccc(Cl)cc1, BrCCCCBr to produce O=S1(=O)N(CCCCBr)c2ccccc2N1c1ccc(Cl)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.