4-(Difluoromethyl)-3-hydroxy-6-nitropyridine-2-carboxamide
3-(Difluoromethyl)-2-hydroxy-6-nitropyridine-4-carboxamide
3-(Aminomethyl)-4-(difluoromethyl)-2-hydroxypyridine-6-acetonitrile
3-(Chloromethyl)-4-(difluoromethyl)-5-hydroxypyridine-2-methanol