15373-31-6 18674-52-7 2,2,3-Trimethylcyclopent-3-enylacetonitrile 3-Cyclopentene-1-acetonitrile, 2,2,3-trimethyl- 3-Cyclopentnen-1-acetonitrile, 2,2,3-trimethyl- EINECS 239-405-4