Ethyl 3-(bromomethyl)-2-hydroxy-4-(trifluoromethoxy)pyridine-6-carboxylate
4-(Fluoromethyl)-6-hydroxy-3-(trifluoromethoxy)pyridine-2-carboxylic acid
Ethyl 2-(bromomethyl)-6-hydroxy-5-(trifluoromethoxy)pyridine-3-carboxylate
4-(Fluoromethyl)-2-hydroxy-3-(trifluoromethoxy)pyridine-5-carboxylic acid