3-(Difluoromethyl)-2-hydroxy-5-nitropyridine-4-carboxaldehyde
2-(Chloromethyl)-5-(difluoromethyl)-3-hydroxypyridine-6-methanol
2-(Bromomethyl)-5-(difluoromethyl)-3-hydroxypyridine-6-acetic acid
2-(Aminomethyl)-4-(difluoromethyl)-5-hydroxypyridine-3-carboxaldehyde