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