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