3-Hydroxy-2-methoxy-5-(trifluoromethoxy)pyridine-6-carboxylic acid
3-Hydroxy-2-methoxy-4-(trifluoromethoxy)pyridine-5-carboxylic acid
4-Hydroxy-3-methoxy-5-(trifluoromethoxy)pyridine-2-methanol
Ethyl 5-hydroxy-3-methoxy-4-(trifluoromethoxy)pyridine-2-carboxylate