Two new triterpenoids from the fresh leaves of Psidium guajava

  • Planta Med. 2002 Dec;68(12):1149-52. doi: 10.1055/s-2002-36353.
Sabira Begum  1 ,  Syed Imran Hassan ,  Bina S Siddiqui
Affiliations
  • 1. H. E. J. Research Institute of Chemistry, International Centre for Chemical Sciences, University of Karachi, Pakistan. [email protected]
PMID: 12494352 DOI: 10.1055/s-2002-36353
Abstract

Two new triterpenoids, guajavolide (2 alpha,3 beta,6 beta,23-tetrahydroxyurs-12-en-28,20 beta-olide; 1) and guavenoic acid (2 alpha,3 beta,6 beta,23-tetrahydroxyurs-12,20(30)-dien-28-oic acid; 2) along with one known triterpene oleanolic acid (3) were isolated from the fresh leaves of Psidium guajava. Their structure elucidation and stereochemistry were determined by spectroscopic experiments, including 2D-NMR techniques.

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