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