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