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New diterpenoids from stems and roots of Caesalpinia crista |
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| Authors: | Sarot Cheenpracha Chatchanok Karalai Chanita Ponglimanont Kan Chantrapromma Shazia Anjum |
| Affiliation: | a Department of Chemistry, Faculty of Science, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand b Research Unit of Natural Products Utilization, School of Science, Walailak University, Thasala, Nakhon Si Thammarat 80160, Thailand c X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia d H.E.J. Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi-75270, Pakistan |
| Abstract: | Nine new cassane-type diterpenes, named taepeenin A-I, and two new norcassane-type diterpenes, named nortaepeenin A-B, were isolated from the stems and roots of Caesalpinia crista along with three known diterpenes: vinhaticoic acid, methyl vinhaticoate and ent-11β-hydroxy-rosa-5,15-diene. Their structures were elucidated on the basis of spectroscopic analysis. In addition, the structure of taepeenin A was confirmed by X-ray diffraction analysis. |
| Keywords: | Caesalpinia crista Taepeenin Nortaepeenin Cassane diterpenes |
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