Ethyl 3-hydroxy-6-nitro-2-(trifluoromethoxy)pyridine-4-carboxylate
4-(Aminomethyl)-5-(difluoromethyl)-3-fluoro-2-iodopyridine
Methyl 3-amino-5-bromo-2-(difluoromethyl)pyridine-6-carboxylate
6-Bromo-3-(difluoromethyl)-4-(trifluoromethyl)pyridine-2-carboxylic acid