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