Some biological properties of the impure dichloride salt of tetrakis[p-(dimethylamino)phenyl]ethylene and a pinacolone

: The impure dichloride salt of tetrakis[p-(dimethylamino)phenyl]ethylene and a pinacolone that is a substituted acetophenone show several biological properties, one of which is activity against lymphosarcoma in mice. The involvement, if any, of free radicals in the biological properties of these substances is discussed.