Ethyl 2,4-difluoro-6-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 3-amino-2-fluoro-5-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 2,4-dimethoxy-6-(trifluoromethoxy)pyridine-3-carboxylate
Ethyl 2,3-difluoro-4-(trifluoromethoxy)pyridine-6-carboxylate