3-(Difluoromethyl)-4-nitro-5-(trifluoromethyl)pyridine-2-acetonitrile
6-(Difluoromethyl)-2-nitro-3-(trifluoromethyl)pyridine-4-acetonitrile
5-(Difluoromethyl)-2-methyl-3-(trifluoromethyl)pyridine-6-acetonitrile
4-(Difluoromethyl)-3-methyl-5-(trifluoromethyl)pyridine-2-acetic acid