4-(Fluoromethyl)-5-hydroxy-3-methoxy-2-(trifluoromethoxy)pyridine
4-(Fluoromethyl)-3-hydroxy-2-methoxy-5-(trifluoromethoxy)pyridine
2-(Chloromethyl)-5-hydroxy-4-methoxy-3-(trifluoromethoxy)pyridine
6-(Chloromethyl)-4-hydroxy-2-methoxy-3-(trifluoromethoxy)pyridine