1,4-benzenediacetonitrile 2,2'-(1,4-phenylene)diacetonitrile 622-75-3 InChI=1/C10H8N2/c11-7-5-9-1-2-10(4-3-9)6-8-12/h1-4H,5-6H p-phenylenediacetonitrile