5-Chloro-2-nitro-4-(trifluoromethoxy)pyridine-3-carboxylic acid
3-Chloro-2-(fluoromethyl)-5-nitro-6-(trifluoromethoxy)pyridine
4-Chloro-5-nitro-2-(trifluoromethoxy)pyridine-3-carboxylic acid
2-Chloro-6-(fluoromethyl)-3-nitro-4-(trifluoromethoxy)pyridine