Ethyl 3-chloro-5-nitro-2-(trifluoromethoxy)pyridine-4-carboxylate
Ethyl 5-chloro-4-nitro-3-(trifluoromethoxy)pyridine-2-carboxylate
2-Cyano-4-hydroxy-6-nitro-3-(trifluoromethoxy)pyridine
Ethyl 3-chloro-4-nitro-2-(trifluoromethoxy)pyridine-5-carboxylate