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11β,20β-Epoxybriaranes from the gorgonian coral Junceella fragilis (Ellisellidae)

  • Tung Pin Su
  • , Tsu Jen Kuo
  • , San Nan Yang
  • , Gene Hsiang Lee
  • , Yen Tung Lee
  • , Yi Chen Wang
  • , Jih Jung Chen
  • , Zhi Hong Wen
  • , Tsong Long Hwang*
  • , Ping Jyun Sung
  • *Corresponding author for this work
  • National Dong Hwa University
  • National Museum of Marine Biology and Aquarium, Taiwan
  • Veterans General Hospital-Kaohsiung Taiwan
  • National Sun Yat-sen University
  • Shu-Zen Junior College of Medicine and Management
  • I-Shou University
  • National Taiwan University
  • Chang Gung University
  • Chang Gung University of Science and Technology
  • Mackay Memorial Hospital Taiwan
  • Kaohsiung Armed Forces General Hospital
  • National Yang Ming Chiao Tung University
  • China Medical University Taichung
  • Kaohsiung Medical University

Research output: Contribution to journalJournal Article peer-review

3 Scopus citations

Abstract

Two 11,20-epoxybriaranes, including a known compound, juncenolide K (1), as well as a new metabolite, fragilide X (2), have been isolated from gorgonian Junceella fragilis collected off the waters of Taiwan. The absolute configuration of juncenolide K (1) was determined by single-crystal X-ray diffraction analysis for the first time in this study and the structure, including the absolute configuration of briarane 2 was established on the basis of spectroscopic analysis and compared with that of model compound 1. One aspect of the stereochemistry of the known compound 1 was revised. Briarane 2 was found to enhance the generation of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2) release from RAW 264.7 cells.

Original languageEnglish
Article number18040183
JournalMarine Drugs
Volume18
Issue number4
DOIs
StatePublished - 2020

Bibliographical note

Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Keywords

  • Briarane
  • COX-2
  • Fragilide
  • INOS
  • Junceella fragilis
  • Juncenolide
  • X-ray

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