5-Hydroxy-2-nitro-3-(trifluoromethoxy)pyridine-4-methanol
2-Hydroxy-4-methoxy-3-(trifluoromethoxy)-5-(trifluoromethyl)pyridine
4-Hydroxy-5-nitro-3-(trifluoromethoxy)pyridine-2-methanol
2-Hydroxy-3-methoxy-5-(trifluoromethoxy)-6-(trifluoromethyl)pyridine