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