Planta Med 2002; 68(12): 1149-1152
DOI: 10.1055/s-2002-36353
Letter
© Georg Thieme Verlag Stuttgart · New York

Two New Triterpenoids from the Fresh Leaves of Psidium guajava

Sabira Begum1 , Syed Imran Hassan1 , Bina S. Siddiqui1
  • 1H. E. J. Research Institute of Chemistry, International Centre for Chemical Sciences, University of Karachi, Pakistan
Further Information

Publication History

Received: April 4, 2002

Accepted: July 31, 2002

Publication Date:
20 December 2002 (online)

Abstract

Two new triterpenoids, guajavolide (2α,3β,6β,23-tetrahydroxyurs-12-en-28,20β-olide; 1) and guavenoic acid (2α,3β,6β,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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Dr. Sabira Begum

H.E.J. Research Institute of Chemistry

International Centre for Chemical Sciences

University of Karachi

Karachi-75270

Pakistan

Phone: +(92-21) 9243233, 9243237-8

Fax: +(92-21) 9243190-1

Email: sabira@khi.comsats.net.pk