2-(Chloromethyl)-6-hydroxy-3-nitro-4-(trifluoromethoxy)pyridine
6-(Chloromethyl)-3-hydroxy-4-nitro-2-(trifluoromethoxy)pyridine
2-(Chloromethyl)-5-hydroxy-3-iodo-6-(trifluoromethoxy)pyridine
2-(Chloromethyl)-4-hydroxy-6-iodo-3-(trifluoromethoxy)pyridine