Ethyl 3-(difluoromethyl)-5-hydroxy-4-methylpyridine-2-carboxylate
Methyl 3-(difluoromethyl)-2-hydroxy-6-methylpyridine-5-acetate
Methyl 2-(difluoromethyl)-5-hydroxy-4-methylpyridine-3-acetate
4-(Difluoromethyl)-3-hydroxy-5-methylpyridine-2-acetic acid