4,4'-Dimethyl-(3,3'-bithiophene)-2,2'-dicarboxaldehyde

4,4-DIMETHYLOXAZOLIDINE-2-THIONE

4,4'-DIMETHYLOCTAFLUOROBIPHENYL

4,4'-Dinitrostilbene-2,2'-disulfonic acid

4,4'-DIPHENYLBENZOPHENONE

4,4-DIPHENYLSEMICARBAZIDE

4',4''(5'')-DI-TERT-BUTYLDIBENZO-18-CROWN-6