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Two New Retigerane-Type Sesterterpenoids from the Lichen Leprocaulon microscopicum

Abstract : Two new sesterterpenes, 1 and 2, have been isolated from the lichen Leprocaulon microscopicum. In addition to classic chromatographic methods, a liquid-liquid chromatography technique, namely centrifugal partition chromatography (CPC) was applied for the purification of compound 2. The structures were determined by analyses of mass spectrometry and 1D- and 2D-NMR data. The relative configuration of the isolated compounds was assigned on the basis of 2D-NOESY experiments. The two compounds possess a rare pentacyclic carbon skeleton typical for lichen metabolism, and quite unusual in the vegetal kingdom.
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Submitted on : Friday, May 20, 2016 - 2:26:14 PM
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Marion Millot, Marie Martin-De-Lassalle, Marylene Chollet-Krugler, Yves Champavier, Lengo Mambu, et al.. Two New Retigerane-Type Sesterterpenoids from the Lichen Leprocaulon microscopicum. Helvetica Chimica Acta, Wiley, 2016, 99 (2), pp.169--173. ⟨10.1002/hlca.201500225⟩. ⟨hal-01274108⟩

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