1-Pentene, 2-methyl- 2-METHYL-1-PENTENE 2-Methyl-pentene-1 2-Methylpent-1-ene 2-Methylpentene 4-01-00-00841 (Beilstein Handbook Reference) 4-Methyl-4-pentene 763-29-1 BRN 1340499 EINECS 212-108-7 NSC 73908