3-Hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-5-sulfonyl chloride
3-Fluoro-4-(fluoromethyl)-2-(trifluoromethoxy)pyridine-5-carboxylic acid
4-(Difluoromethyl)-3-hydroxy-2-methyl-5-(trifluoromethoxy)pyridine
6-Hydroxy-2-nitro-4-(trifluoromethoxy)pyridine-3-sulfonyl chloride