2-Bromo-3-nitro-6-(trifluoromethoxy)pyridine-5-sulfonyl chloride
3-Chloro-4-cyano-5-(trifluoromethoxy)pyridine-2-acetic acid
4-Bromo-2-methyl-3-(trifluoromethoxy)pyridine-6-sulfonyl chloride
3-Chloro-2-cyano-6-(trifluoromethoxy)pyridine-5-acetic acid