isoprene

[1. an unsaturated five-carbon hydrocarbon with a branched chain, which in the plant and animal kingdom is used as the basis for the formation of isoprenoids, terpenes, carotenoids and related pigments, rubber. Fat-soluble vitamins either are isoprenoid or have isoprenoid side chains; steroids are synthesized via isoprenoid intermediates, as are ubiquinone, dolichol, and prenylated proteins.

Molecular Formula: C₅H₈

InChI: InChI=1/C5H8/c1-4-5(2)3/h4H,1-2H2,3H3

InChIKey: InChIKey=RRHGJUQNOFWUDK-UHFFFAOYAS
SMILES: CC(=C)C=C

CAS number 78-79-5

Names:
    CH2=C(CH3)CH=CH2
    ISOPRENE
    isoprene
    β-methylbivinyl
    1,3-Butadiene, 2-methyl-
    2-methylbuta-1,3-diene
    2-methyl-1,3-butadiene

Registries:
    PubChem CID 6557
    CAS 78-79-5 (from NIST)
    ChEBI 35194
    PubChem ID 10349986