3-(Chloromethyl)-2-hydroxy-4-nitro-5-(trifluoromethoxy)pyridine
2-(Chloromethyl)-5-hydroxy-3-nitro-4-(trifluoromethoxy)pyridine
2-(Chloromethyl)-3-hydroxy-4-nitro-5-(trifluoromethoxy)pyridine
3-Hydroxy-5-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-4-carboxylic acid