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