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