Methyl 2,6-difluoro-4-(trifluoromethoxy)pyridine-3-carboxylate
Methyl 2-amino-4-bromo-3-(trifluoromethoxy)pyridine-6-carboxylate
Methyl 2-amino-3-bromo-6-(trifluoromethoxy)pyridine-4-carboxylate
Methyl 2,5-difluoro-4-(trifluoromethoxy)pyridine-3-carboxylate