Methyl 3-amino-2-cyano-6-(difluoromethyl)pyridine-5-acetate
3-Chloro-4-nitro-6-(trifluoromethoxy)pyridine-2-carbonyl chloride
Ethyl 4-amino-3-(difluoromethyl)-5-iodopyridine-2-carboxylate
Methyl 2-bromo-4-nitro-3-(trifluoromethoxy)pyridine-5-carboxylate