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