Methyl 3-(difluoromethyl)-4-nitro-6-(trifluoromethoxy)pyridine-2-carboxylate
Ethyl 3-(difluoromethyl)-2-nitro-5-(trifluoromethoxy)pyridine-6-acetate
4-Methyl-2-nitro-5-(trifluoromethoxy)pyridine-3-sulfonyl chloride
Ethyl 2-(difluoromethyl)-6-nitro-3-(trifluoromethoxy)pyridine-4-acetate