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