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