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