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