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