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