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Published on: October 4, 2019

Two new ent-kaurane diterpenoids from Pteris semipinnata.

Rong Bai1, Yang Zhou, Sa Deng

  • 1a School of Pharmacy, Dalian Medical University , Dalian , 116044 , China.

Journal of Asian Natural Products Research
|July 23, 2013
PubMed
Summary

Researchers isolated two novel kaurane diterpenoids from Pteris semipinnata. These new compounds, along with six known ones, were identified using advanced spectral analysis, including 2D NMR and HR-MS.

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Area of Science:

  • Natural Product Chemistry
  • Phytochemistry
  • Organic Chemistry

Background:

  • Pteris semipinnata is a fern species with potential for novel chemical discoveries.
  • Diterpenoids are a class of natural products with diverse biological activities.

Purpose of the Study:

  • To isolate and characterize new chemical compounds from the aerial parts of Pteris semipinnata.
  • To elucidate the structures of newly discovered compounds using comprehensive spectroscopic methods.

Main Methods:

  • Isolation of compounds using chromatographic techniques.
  • Structure elucidation utilizing Nuclear Magnetic Resonance (NMR) spectroscopy, including 2D NMR.
  • High-resolution Mass Spectrometry (HR-MS) for accurate mass determination.

Main Results:

  • Two new ent-kaurane diterpenoids were isolated and identified.
  • The structures were determined to be 6β,11α-dihydroxy-15-oxo-ent-kaur-16-en-19-oic acid (1) and 7α,11α-dihydroxy-15-oxo-ent-kaur-16-en-19-oic acid (2).
  • Six known compounds were also isolated and identified from the same plant material.

Conclusions:

  • The chemical investigation of Pteris semipinnata yielded two previously undescribed kaurane diterpenoids.
  • The structural assignments were confirmed through extensive spectroscopic data analysis.
  • This study expands the knowledge of the chemical constituents of Pteris semipinnata.