3-Hydroxy-2-methyl-4-(trifluoromethoxy)pyridine-6-sulfonyl chloride
6-Hydroxy-3-methyl-2-(trifluoromethoxy)pyridine-4-sulfonyl chloride
4-(Fluoromethyl)-3-hydroxy-2-(trifluoromethoxy)pyridine-5-acetic acid
3-(Fluoromethyl)-4-hydroxy-2-(trifluoromethoxy)pyridine-5-acetic acid