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