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