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