Ethyl 4-cyano-2-(difluoromethyl)-6-(trifluoromethyl)pyridine-3-carboxylate
Methyl 3-(difluoromethyl)-6-fluoro-2-hydroxypyridine-4-carboxylate
Methyl 4-(difluoromethyl)-3-fluoro-5-hydroxypyridine-2-carboxylate
Methyl 4-cyano-2-(difluoromethyl)-3-(trifluoromethyl)pyridine-5-acetate