Ketoprofen EP impurity L;2,4,5-Trimethylketoprofen;QISHTWCSIVFJBU-UHFFFAOYSA-N;rac-2’,4’,5’-TrimethylKetoprofen;Ketoprofen Impurity 12(Ketoprofen EP Impurity L);Ketoprofen EP Impurity L (Mixture of Enantiomer);2-(3-(2,4,5-trimethylbenzoyl)phenyl)propanoic acid;Benzeneacetic acid, α-methyl-3-(2,4,5-trimethylbenzoyl)-;2-(3-(2,4,5-Trimethylbenzoyl)phenyl)propanoic acid (Ketoprofen Impurity);Ketoprofen impurity 7/Ketoprofen EP Impurity L/rac-2’,4’,5’-Trimethyl Ketoprofen/2-(3-(2,4,5-trimethylbenzoyl)phenyl)propanoic acid