4,6-Dihydroxy-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine
4,6-Dihydroxy-3-(trifluoromethoxy)-2-(trifluoromethyl)pyridine
2,4-Dihydroxy-3-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
2,3-Dihydroxy-6-(trifluoromethoxy)-5-(trifluoromethyl)pyridine