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
3-(Difluoromethyl)-5-fluoro-6-hydroxypyridine-2-acetic acid