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