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