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