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