Methyl 2-(difluoromethyl)-3-hydroxy-4-methoxypyridine-6-acetate
Methyl 2-bromo-4-(difluoromethyl)pyridine-6-acetate
Methyl 3-chloro-2-(difluoromethyl)-4-nitropyridine-6-carboxylate
3-(Aminomethyl)-6-chloro-2-(trifluoromethoxy)pyridine-5-carboxylic acid