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