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