4-Hydroxy-2-(trifluoromethoxy)-5-(trifluoromethyl)pyridine-3-carboxylic acid
2-Hydroxy-6-(trifluoromethoxy)-5-(trifluoromethyl)pyridine-3-carboxylic acid
2-Iodo-5-methyl-3-(trifluoromethoxy)-4-(trifluoromethyl)pyridine
5-Hydroxy-3-(trifluoromethoxy)-2-(trifluoromethyl)pyridine-4-carboxylic acid