Ethyl 2-chloro-3-nitro-5-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 3-cyano-2-nitro-5-(trifluoromethoxy)pyridine-6-carboxylate
Methyl 2-cyano-6-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-4-carboxylate
Methyl 3-cyano-2-nitro-4-(trifluoromethoxy)pyridine-5-carboxylate