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