2-(Difluoromethyl)-3-nitro-5-(trifluoromethoxy)pyridine-4-carboxylic acid
5-(Difluoromethyl)-2-nitro-4-(trifluoromethoxy)pyridine-3-carboxaldehyde
4-Methyl-2-nitro-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride
4-(Difluoromethyl)-5-nitro-2-(trifluoromethoxy)pyridine-3-carboxaldehyde