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