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