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