3-Chloro-1-(4-fluorophenyl)propan-1-one3-Chloro-4'-fluoropropiophenone2-Chloroethyl-4-fluorophenyl ketonep-FLUORO-β-CHLOROPROPIOPHENONE3-氯-4′-氟苯丙酮3-Chloro-4′-fluoropropiophenone3-氯-4'-氟苯丙酮3-Chloro-4'-fluoropropiophenone2-Chloroethyl 4-fluorophenyl ketone