6-(Chloromethyl)-3-methoxy-2-(trifluoromethoxy)pyridine-4-carboxylic acid
4-(Bromomethyl)-3-methoxy-2-(trifluoromethoxy)pyridine-6-carboxylic acid
2-(Chloromethyl)-5-methoxy-3-(trifluoromethoxy)pyridine-6-carboxylic acid
3-(Bromomethyl)-5-methoxy-6-(trifluoromethoxy)pyridine-2-carboxylic acid