Sterane

Sterane (cyclopentanoperhydrophenanthrenes) compounds are a class of tetracyclic compounds derived from steroids or sterols via diagenetic and catagenetic degradation and hydrogenation. Steranes have an androstane skeleton with a side chain at carbon C-17. The sterane structure constitutes the core of all sterols. Steranes are sometimes used as biomarkers for the presence of eukaryotic cells.[1] The oldest preserved steranes are found in sedimentary rocks deposited ca. 720–820 million years ago.[2]

For the drug with trade name Sterane, see Prednisolone.
Numbering of the C atoms. In steranes the side chain at C-17 varies.

Steranes may be rearranged to diasteranes during diagenesis (C-27 to C-30, rearrangement at C-18 and C-19, no R at C-24). Oils from clastic source rocks tend to be rich in diasteranes.

Cholesterol and its derivatives (such as progesterone, aldosterone, cortisol, and testosterone), are common examples of compounds with the cyclopentanoperhydrophenanthrene nucleus.

See also

References
  1. "About biomarkers". The Summons Lab, Massachusetts Institute of Technology (MIT). November 2006. Archived from the original on 24 April 2020. Retrieved 8 October 2009.
  2. Brocks, Jochen J.; Jarrett, Amber J. M.; Sirantoine, Eva; Hallmann, Christian; Hoshino, Yosuke; Liyanage, Tharika (2017-08-31). "The rise of algae in Cryogenian oceans and the emergence of animals". Nature. 548 (7669): 578–581. doi:10.1038/nature23457. ISSN 0028-0836.


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