3-Bromo-6-(fluoromethyl)-2-(trifluoromethoxy)pyridine-5-carboxylic acid
3-Chloro-2-(chloromethyl)-4-cyano-5-(trifluoromethoxy)pyridine
5-Bromo-2-(fluoromethyl)-3-(trifluoromethoxy)pyridine-6-carboxylic acid
6-Chloro-2-(chloromethyl)-4-cyano-3-(trifluoromethoxy)pyridine