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