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