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