2,3'-Bipyridine, 5-chloro-6'-methyl-3-(4-(methylsulfonyl)phenyl)- 202409-33-4 5-Chloro-6'-methyl-3-(4-(methylsulfonyl)phenyl)-2,3'-bipyridine Arcoxia Etoricoxib L-791456 MK 0663 MK 663