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