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