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