4-Hydroxy-6-methyl-3-(trifluoromethoxy)pyridine-2-carboxylic acid
4-(Fluoromethyl)-2-hydroxy-6-(trifluoromethoxy)pyridine-3-methanol
5-Iodo-3-methyl-2-nitro-4-(trifluoromethoxy)pyridine
3-Hydroxy-5-methyl-2-(trifluoromethoxy)pyridine-4-carboxylic acid