Welcome to the MedLibrary.org Wikipedia Supplement on Oleanane -- Please Click to Return to Front Page

Oleananes is the name given to chemicals produced by many flowering plants, which have a suppressing effect on some insect pest organisms. Technically they are oleanane triterpanes.

They are considered a key marker differentiating flowering plants from other life, and have been used in the effort to study their evolution which is as of yet poorly documented in the fossil record.

These compounds appear to have been shared by a group of plants called gigantopterids, which lived twice as long ago as the oldest known flower fossils. They may have been close relatives of the flowering plants, moving the divergence of the flowering plant lineage back to more than 250 million years ago. However oleanane is also recorded from ferns.^{verification neededcitation needed}

References

• Miller, John M. (2007): Paleobotany of Angiosperm Origins. Version of 2007-DEC-10. Retrieved 2007-DEC-12.{7check}}

External links

• Revised Section F: Natural Products and Related Compounds: Oleanane

This biochemistry article is a stub. You can help Wikipedia by expanding it.

	This paleontology article is a stub. You can help Wikipedia by expanding it.

Wikipedia content modification information:

• This page was last modified on 10 March 2008, at 04:27.

Wikipedia Authorship and Review

Wikipedia content provided here is not reviewed directly by MedLibrary.org. Wikipedia content is authored by an open community of volunteers and is not produced by or in any way affiliated with MedLibrary.org.

Wikipedia Usage Guidelines

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article on "Oleanane".

The URL for this specific entry is:

• http://medlibrary.org/medwiki/Oleanane

All Wikipedia text is available under the terms of the GNU Free Documentation License. (See Copyrights for details). Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc.