3-(Difluoromethyl)-6-nitro-2-(trifluoromethoxy)-4-(trifluoromethyl)pyridine
3-(Difluoromethyl)-6-nitro-4-(trifluoromethoxy)-2-(trifluoromethyl)pyridine
5-(Difluoromethyl)-2-nitro-3-(trifluoromethoxy)-6-(trifluoromethyl)pyridine
4-(Difluoromethyl)-5-nitro-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine