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