5-Hydroxy-4-nitro-2-(trifluoromethoxy)pyridine-3-carbonyl chloride
3-Hydroxy-4-nitro-5-(trifluoromethoxy)pyridine-2-carbonyl chloride
5-(Chloromethyl)-2-hydroxy-3-methoxy-4-(trifluoromethoxy)pyridine
4-(Chloromethyl)-5-hydroxy-3-methoxy-2-(trifluoromethoxy)pyridine