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