5-(Chloromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-6-carboxylic acid
6-Iodo-4-methyl-2-(trifluoromethoxy)pyridine-3-carboxylic acid
4-(Chloromethyl)-3-hydroxy-6-(trifluoromethoxy)pyridine-2-carboxylic acid
2-Iodo-4-methyl-5-(trifluoromethoxy)pyridine-3-carboxylic acid