Calaminthadiol,a new 3,4-secotriterpenoid from Satureia calamintha and Satureia graeca |
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Authors: | Placido Giannetto Giovanni Romeo Maria C Aversa |
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Institution: | 1. Istituto di Chimica organica, Universitá di Messina, Italy;2. Istituto di Biochimica applicata, Universitá di Messina, Italy |
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Abstract: | A new triterpenoid, calaminthadiol, 3,4-seco-4(23),12-ursadien-3,28-diol, was isolated from the leaves of Satureia calamintha and Satureia graeca. Its structure was elucidated by spectroscopic methods and partial synthesis. The natural occurrence of this compound can be conclusive for the chemotaxonomic characterization of the genus because of the rarity of the 3,4-fission in the α- and β-amyrin skeletons. A biogenetic mechanism for its formation is proposed. Sitosterol, stigmasterol and campesterol were also isolated. |
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Keywords: | Labiatae 3 4-secopentacyclic triterpenoid new ursane derivatives sterols |
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