6-Nitro-3-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-4-sulfonyl chloride
2-Nitro-4-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-3-sulfonyl chloride
Methyl 3-(difluoromethyl)-2-nitro-4-(trifluoromethoxy)pyridine-6-carboxylate
Methyl 6-(difluoromethyl)-3-nitro-2-(trifluoromethoxy)pyridine-4-carboxylate