Ethyl 3,5-difluoro-2-(trifluoromethoxy)pyridine-6-carboxylate
6-Amino-2-fluoro-4-(trifluoromethoxy)pyridine-3-carboxylic acid
Ethyl 3,4-difluoro-2-(trifluoromethoxy)pyridine-6-carboxylate
6-Amino-3-fluoro-4-(trifluoromethoxy)pyridine-2-carboxylic acid