35443-88-0 4-Chloro-4,4-difluoro-3-(chlorodifluoromethyl)-1-phenyl-2-buten-1-one 4-Chloro-4,4-difluoro-3-chlorodifluoromethylcrotonophenone BRN 2133809 CROTONOPHENONE, 4-CHLORO-4,4-DIFLUORO-3-(CHLORODIFLUOROMETHYL)-