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