Isolation of bioactive limonoids from the fruits of Melia azedarach

Seon Ju Park, Nguyen Xuan Nhiem, Lalita Subedi, Ikhoon Oh, Ji Young Kim, Sun Yeou Kim, Seung Hyun Kim

Research output: Contribution to journalArticle


Two previously undescribed limonoids, 1-O-benzoyl-3-O-deactylnimbolinin C (1) and a pair of epimers named toosendalactonins A and B (12a and 12b), together with ten known compounds (2−11) were isolated from the fruits of Melia azedarach L. Their structures were determined by extensive spectroscopic methods, including 1D-, 2D-nuclear magnetic resonance, and mass spectrometry. All the isolated compounds were evaluated for their nitric oxide (NO) inhibition in lipopolysaccharide-activated microglia and nerve growth factor (NGF) production in astrocytes. Compounds 1−2 and 5−8 significantly inhibited NO production, which is comparable to the positive control, L-NMMA. Previously undescribed limonoid, compound 12, and two known limonoids, munronin K (3) and 12-O-methyl-1-O-deacetyl-nimbolinin B (4), showed the highest potency to increase the NGF production in C6 astrocytes. (Figure presented.).

Original languageEnglish
Pages (from-to)830-838
Number of pages9
JournalJournal of Asian Natural Products Research
Issue number9
Publication statusPublished - 2020 Sep 1

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Molecular Medicine
  • Pharmacology
  • Pharmaceutical Science
  • Drug Discovery
  • Complementary and alternative medicine
  • Organic Chemistry

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