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