3,4-Difluoroacetophenone (CAS NO.369-33-5), its Synonyms are 1-(3,4-Difluorophenyl)ethan-1-one ; Ethanone, 1-(3,4-difluorophenyl)- ; 3',4'-Difluoroacetophenone ; 1-(3,4-Difluorophenyl)ethanone .