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