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