Researches in Organic Geochemistry

Researches in Organic Geochemistry

Online ISSN : 2189-7891
Print ISSN : 1344-9915
ISSN-L : 1344-9915

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Volume 35, Issue 1

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Confirmation of the structure of sn-2-sestaterpenyl (C₂₅) “extended” archaeol with the comparison of sn-3-sestaterpenyl counterpart in halophilic archaeal lipid core and possibility of novel halophilic archaea

Noriaki Yamauchi

2019 Volume 35 Issue 1 Pages 1-10
Published: December 30, 2019
Released on J-STAGE: December 26, 2020

DOIhttps://doi.org/10.20612/rog.35.1_1

JOURNAL FREE ACCESS

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Two potential regioisomers of "extended" C20-C25 archaeol were chemically prepared and mass spectra of their trimethyl silyl ethers were observed. The previously reported biological samples were confirmed as sn-2-sestaterpenyl(C25) isomer, with the longer C25 isopernoidal chain linked at the center hydroxyl group of the glycerol. The mass spectrum of a sn-3-sestaterpenyl isomer was different. However, the corresponding C20-C25 archaeol extracted from a halite previously reported could be a mixture of the two regioisomers. The result suggests the existence of novel (unrevealed) halophilic archaea inhabiting ancient hypersaline environments or that grow very slowly in halites.

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