Ethyl 3-(difluoromethyl)-6-nitro-2-(trifluoromethoxy)pyridine-5-acetate
Ethyl 3-(difluoromethyl)-5-nitro-4-(trifluoromethoxy)pyridine-2-acetate
Ethyl 3-(aminomethyl)-2-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-5-carboxylate
Ethyl 3-(aminomethyl)-2-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-6-carboxylate