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