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