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