Studies on the constituents of Leonotis nepetaefolia

Tadahiro Takeda, Yuji Narukawa, Noriyasu Hada

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


Three antioxidative phenylethanoid glycosides and two new iridoid glycosides, along with three known iridoids were isolated from the African medicinal plant, Leonotis nepetaefolia R. BR. (Labiatae). The new iridoid glycosides were established as 10-O-(trans-3,4-dimethoxycinnamoyl)geniposidic acid and 10-O-(p-hydroxybenzoyl)geniposidic acid. Antioxidative activities of the compounds were measured by α,α-diphenyl-β-picrylhydrazyl (DPPH) method, and the three known phenylethanoid glycosides, acteoside, martynoside and lavandulifolioside showed strong antioxidative activity.

Original languageEnglish
Pages (from-to)284-286
Number of pages3
JournalChemical and Pharmaceutical Bulletin
Issue number2
Publication statusPublished - 1999 Feb


  • Acylated geniposidic acid
  • Antioxidative activity
  • Labiatae
  • Leonotis nepetaefolia
  • Phenylethanoid glycoside

ASJC Scopus subject areas

  • General Chemistry
  • Drug Discovery


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