3-(Difluoromethyl)-6-hydroxy-2-(trifluoromethoxy)pyridine-5-carboxylic acid
5-(Difluoromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-6-carboxylic acid
2-(Difluoromethyl)-5-hydroxy-3-(trifluoromethoxy)pyridine-4-carboxaldehyde
4-(Difluoromethyl)-2-hydroxy-6-(trifluoromethoxy)pyridine-3-carboxylic acid