Ethyl 3-hydroxy-6-nitro-2-(trifluoromethoxy)pyridine-5-carboxylate
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