Methyl 2-(difluoromethyl)-4-hydroxy-5-methoxypyridine-3-carboxylate
3-(Aminomethyl)-6-(difluoromethyl)-2-hydroxy-4-nitropyridine
5-(Aminomethyl)-3-(difluoromethyl)-2-hydroxy-4-nitropyridine
3-(Chloromethyl)-2-(difluoromethyl)-6-hydroxy-5-nitropyridine