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