2,2,2-Trifluoro-1-(4-fluorophenyl)ethan-1-one 655-32-3 Acetophenone, 2,2,2,4'-tetrafluoro- EINECS 211-509-4 Ethanone, 2,2,2-trifluoro-1-(4-fluorophenyl)- NSC 158171 p,alpha,alpha,alpha-Tetrafluoroacetophenone p-Fluorotrifluoroacetophenone