(Z)-4-Methyl-2-pentene 2-Pentene, 4-methyl-, (Z)- (8CI)(9CI) 4-METHYL-2-PENTENE (CIS) 4-Methyl-cis-2-pentene 691-38-3 EINECS 211-721-7 NSC 73913 cis-4-Methylpent-2-ene