Polymethylsqualanes from Botryococcus braunii in lacustrine sediments and crude oils

Roger E. Summons*, Pierre Metzger, Claude Largeau, Andrew P. Murray, Janet M. Hope

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    35 Citations (Scopus)


    A novel hydrocarbon 3,7,18,22-tetramethylsqualane has been identified in extracts from the Maniguin-2 well on Maniguin Island, Philippines, the Duri oil from Sumatra, Indonesia and the Maoming Oil Shale from China. A related hydrocarbon, tentatively assigned the structure 3,7,11,14-tetramethylsqualane, occurs in the Maniguin samples. Like C 34 botryococcane, the tetramethylsqualanes are unusually enriched in 13C compared to co-occuring n-alkanes and C 16-20 acyclic isoprenoids. Polymethylsqualanes extend the range of distinctive hydrocarbons produced by Botryo- coccus braunii and its fossil counterparts.

    Original languageEnglish
    Pages (from-to)99-109
    Number of pages11
    JournalOrganic Geochemistry
    Issue number2
    Publication statusPublished - 2002


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