(E)-2-Pentene 2-PENTENE 2-Pentene, (2E)- 2-Pentene, (E)- 32968-64-2 4-01-00-00814 (Beilstein Handbook Reference) 646-04-8 BRN 1718795 EINECS 211-461-4 HSDB 5736 trans-2-Pentene trans-Pent-2-ene trans-beta-Amylene trans-beta-N-Amylene