2-Fluoro-5-hydroxy-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride
3-Fluoro-6-hydroxy-2-(trifluoromethoxy)pyridine-5-sulfonamide
3-(Difluoromethyl)-6-fluoro-4-(trifluoromethoxy)pyridine-2-acetic acid
4-(Difluoromethyl)-2-fluoro-3-(trifluoromethoxy)pyridine-5-acetic acid