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