35554-23-5 4-Chloro-3-chlorodifluoromethyl-4,4-difluoro-m-nitrocrotonophenone 4-Chloro-4,4-difluoro-3-(chlorodifluoro)methyl-1-(m-nitrophenyl)-2-buten-1-one BRN 2168136 CROTONOPHENONE, 4-CHLORO-3-CHLORODIFLUOROMETHYL-4,4-DIFLUORO-m-NITRO-