3-Bromo-6-(difluoromethyl)-2-nitro-4-(trifluoromethoxy)pyridine
4-Bromo-5-(difluoromethyl)-2-nitro-3-(trifluoromethoxy)pyridine
Methyl 5-chloro-2-cyano-3-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 5-chloro-4-cyano-3-(trifluoromethoxy)pyridine-2-carboxylate