Ethyl 6-hydroxy-4-nitro-2-(trifluoromethoxy)pyridine-3-carboxylate
Methyl 2-hydroxy-5-methoxy-4-(trifluoromethoxy)pyridine-3-carboxylate
4-(Difluoromethyl)-3-fluoro-5-nitro-2-(trifluoromethoxy)pyridine
Ethyl 2-hydroxy-4-nitro-5-(trifluoromethoxy)pyridine-3-carboxylate