4-(Trifluoroacetyl)benzoic acid4'-Carboxy-2,2,2-trifluoroacetophenone1-(4-Carboxyphenyl)-2,2,2-trifluoroethan-1-one4-(Trifluoroacetyl)benzoic acid 97+%4-(三氟乙酰基)苯甲酸4-Carboxy-alpha,alpha,alpha-trifluoroacetophenone4-(Trifluoroacetyl)benzoic acid4-(2,2,2-Trifluoroacetyl)benzoic acid