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