A new ent-kaurane diterpene from stems of Alibertia macrophylla K. Schum. (Rubiaceae)
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Wiley
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Resumo
Phytochemical investigations of the stems of a specimen of Alibertia macrophylla led to the isolation and characterization of the new diterpene ent-kaurane-2β,3α,16α-triol (1), along with triterpenes 2-8, iridoids 9-12, and phenolic acids 13-15. The structure of 1 was established based on spectroscopic studies (1H- and 13C-NMR, IR, and HR-ESI-MS). This is the first report of the isolation of a diterpene from the Alibertia genus in Rubiaceae. © 2007 Verlag Helvetica Chimica Acta AG.
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Alibertia macrophylla , Kaurane diterpene , Phytochemical investigations , Nuclear magnetic resonance spectroscopy , Phenols , Plants (botany) , Spectroscopic analysis , Olefins , 6beta hydroxygeniposide , alpha amirenone , beta amirenone , caffeic acid , ent kaurane 2beta,3alpha,16alpha triol , ent kaurane diterpene , gardenoside , germanicone , iridoid , kaurane derivative , lupenone , lupeol , oleanolic acid , phenol , plant extract , protocatechuic acid , shanziside methyl ester , sitosterol , steroid , stigmasterol , triterpene derivative , unclassified drug , ursolic acid , vanillic acid , drug isolation , drug structure , electrospray mass spectrometry , infrared spectroscopy , nuclear magnetic resonance spectroscopy , plant stem , priority journal , Rubiaceae
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Inglês
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Helvetica Chimica Acta, v. 90, n. 9, p. 1781-1785, 2007.
