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