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