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