Antimicrobial and cytotoxic abietane diterpenoids from the roots of Meriandera benghalensis (Roxb.) Benth

Pharmazie. 2009 Sep;64(9):613-5.


Four abietane diterpenoids were isolated from the methanolic extract of the roots of Meriandera benghalensis and tested for their biological activity. Cryptotanshinone (2) and 17-hydroxycryptotanshinone (4) are known metabolites however the occurrence of tanshinone IIA (1) and przewaquinone A (3) from Meriandera benghalensis is reported for the first time. The four diterpenoids were identified by MS and one- and two dimensional NMR experiments. The isolated compounds were tested for their in vitro antiproliferative activity against three human cancer cell lines (a lung cancer (A-427), a urinary bladder cancer (5637) and a breast cancer (MCF-7) cell line) and for their antibacterial effect against three Gram-positive bacterial strains. All four abietanes showed potent cytotoxic effect against all cancer cell lines (IC50 between 1 and 8 microM) as well as antibacterial effect against the bacteria tested (MIC values between 33 and 70 microM).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Abietanes / isolation & purification
  • Abietanes / pharmacology*
  • Anti-Infective Agents / isolation & purification
  • Anti-Infective Agents / pharmacology*
  • Antineoplastic Agents, Phytogenic / isolation & purification
  • Antineoplastic Agents, Phytogenic / pharmacology*
  • Cell Line, Tumor
  • Gram-Positive Bacteria / drug effects
  • Humans
  • Lamiaceae / chemistry*
  • Mass Spectrometry
  • Microbial Sensitivity Tests
  • Plant Roots / chemistry
  • Spectrophotometry, Infrared
  • Spectrophotometry, Ultraviolet
  • Structure-Activity Relationship


  • Abietanes
  • Anti-Infective Agents
  • Antineoplastic Agents, Phytogenic