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