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