Using BrCCCBr, COc1ccc(CONS(=O)(=O)c2ccc(C)cc2)cc1 to produce COc1ccc(CON(CCCBr)S(=O)(=O)c2ccc(C)cc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.