3-Fluoro-2-(fluoromethyl)-4-methoxy-6-(trifluoromethoxy)pyridine
5-(Fluoromethyl)-2-hydroxy-3-methyl-4-(trifluoromethoxy)pyridine
4-(Fluoromethyl)-5-hydroxy-3-methyl-2-(trifluoromethoxy)pyridine
4-(Fluoromethyl)-3-hydroxy-2-methyl-5-(trifluoromethoxy)pyridine