6-Hydroxy-4-nitro-2-(trifluoromethoxy)pyridine-3-sulfonamide
5-Iodo-4-methoxy-2-methyl-3-(trifluoromethoxy)pyridine
4-(Difluoromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-5-carboxylic acid
5-(Difluoromethyl)-3-hydroxy-4-(trifluoromethoxy)pyridine-2-carboxylic acid