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