Methyl 4,6-difluoro-3-(trifluoromethoxy)pyridine-2-carboxylate
Ethyl 2-(chloromethyl)-6-methyl-4-(trifluoromethoxy)pyridine-3-carboxylate
Methyl 2,3-difluoro-5-(trifluoromethoxy)pyridine-6-carboxylate
Ethyl 2-(chloromethyl)-5-methyl-4-(trifluoromethoxy)pyridine-3-carboxylate