2-Chloro-6-nitro-3-(trifluoromethoxy)pyridine-4-carboxaldehyde
2-Chloro-3-methyl-6-(trifluoromethoxy)pyridine-4-sulfonyl chloride
6-Chloro-3-nitro-4-(trifluoromethoxy)pyridine-2-carboxaldehyde
6-Chloro-4-nitro-3-(trifluoromethoxy)pyridine-2-carboxaldehyde