2-((2-Chloro-6-fluorophenyl)amino)-5-methylbenzeneacetic acid 220991-20-8 Benzeneacetic acid, 2-((2-chloro-6-fluorophenyl)amino)-5-methyl- COX 189 COX-189 COX189 Lumiracoxib Lumiracoxib [USAN:INN] Prexige