Sterane

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

Sterane (cyclopentanoperhydrophenanthrenes or cyclopentane perhydro phenanthrene) compounds are a class of 4-cyclic compounds derived from steroids or sterols via diagenetic and catagenetic degradation and saturation. 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]

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.

References

  1. ↑ About biomarkers geobiology@mit. Accessed 8 October 2009.


This article is issued from Wikipedia - version of the 11/22/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.