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Diverse Types of Diterpenoids with an Aromatized C Ring from the Twigs of Podocarpus imbricatus.

Bin ZhouYu-Hao RenYing-Shan HanThibault MesplèdeJian-Min Yue
Published in: Journal of natural products (2020)
An ethanol extract of the powdered twigs of Podocarpus imbricatus afforded 14 new diterpenoids (1-14), which all share an aromatized C ring. These isolates belong to five diterpenoid types that include abietanes (1-3), semperviranes (4-9), totaranes (10-12), a C-17 norabietane (13), and an icetexane (14). Their structures were assigned mainly by analysis of the spectroscopic data, and the absolute configuration of 1 was determined by X-ray crystallography. A biosynthetic pathway for five of the biogenetically related types of diterpenoids was proposed. Compound 7 showed moderate inhibitory activity against Zika virus with an IC50 value of 2.5 μM.
Keyphrases
  • zika virus
  • dengue virus
  • high resolution
  • aedes aegypti
  • oxidative stress
  • electronic health record
  • computed tomography
  • magnetic resonance
  • mass spectrometry
  • magnetic resonance imaging
  • contrast enhanced