Hydrangenone, a new isoprenoid with an unprecedented skeleton from Salvia hydrangea |
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Authors: | Farimani M Moridi Taheri Salman Ebrahimi Samad N Bahadori M Babak Khavasi Hamid R Zimmermann Stefanie Brun Reto Hamburger Matthias |
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Affiliation: | Department of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, G. C., Evin, Tehran, Iran. m_moridi@sbu.ac.ir |
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Abstract: | Hydrangenone, a new heptacyclic isoprenoid with a 6/7/6/5/5 membered carbon ring skeleton, was isolated from the aerial parts of Salvia hydrangea. The structure was established by extensive NMR spectroscopic methods. The relative and absolute configuration of 1 was assigned by NOESY and X-ray crystallographic analysis and by comparison of experimental and calculated electronic circular dichroism (ECD) spectra. Compound 1 showed in vitro antiplasmodial activity, with an IC(50) value of 1.4 μM against P. falciparum. A plausible biosynthetic pathway of 1 was also proposed. |
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