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