Ethyl 5-fluoro-2-hydroxy-4-(trifluoromethoxy)pyridine-3-acetate
4-Fluoro-2-(difluoromethyl)-3-hydroxy-5-(trifluoromethoxy)pyridine
Ethyl 4-fluoro-3-hydroxy-5-(trifluoromethoxy)pyridine-2-acetate
3-Fluoro-2-methyl-5-(trifluoromethoxy)pyridine-4-carbonyl chloride