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