2-Chloro-4-(chloromethyl)-5-hydroxy-3-(trifluoromethoxy)pyridine
2-Chloro-3-(chloromethyl)-5-hydroxy-4-(trifluoromethoxy)pyridine
2-Chloro-3-(difluoromethyl)-5-hydroxy-4-(trifluoromethoxy)pyridine
5-Chloro-2-(fluoromethyl)-4-hydroxy-3-(trifluoromethoxy)pyridine