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