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