Ethyl 6-(difluoromethyl)-2-methyl-4-(trifluoromethoxy)pyridine-3-carboxylate
Methyl 3,4-diamino-2-(trifluoromethoxy)pyridine-6-carboxylate
Methyl 2,6-diamino-3-(trifluoromethoxy)pyridine-5-carboxylate
Methyl 3,6-diamino-2-(trifluoromethoxy)pyridine-4-carboxylate