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