2-Hydroxy-5-methoxy-3-(trifluoromethoxy)pyridine-4-carboxaldehyde
4-(Difluoromethyl)-2-hydroxy-3-methoxy-5-(trifluoromethoxy)pyridine
2-Hydroxy-3-methoxy-5-(trifluoromethoxy)pyridine-6-carboxaldehyde
6-(Difluoromethyl)-2-hydroxy-4-methoxy-3-(trifluoromethoxy)pyridine