2-Bromo-2',4'-difluoroacetophenone2-Bromo-1-(2,4-difluorophenyl)ethan-1-one2-Bromo-2',4'-difluoroacetophenone2,4-Difluorophenacyl bromide 98%2-溴-2′,4′-二氟苯乙酮2-Bromo-1-(2,4-difluorophenyl)ethanone2-Bromo-2′,4′-difluoroacetophenone2,4-Difluorophenacyl Bromide