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