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