A new ethylene glycol triterpenoid from the leaves of Psidium guajava

Sabira Begum; Syed Nawazish Ali; Syed Imran Hassan; Bina S Siddiqui

doi:10.1080/14786410601083712

A new ethylene glycol triterpenoid from the leaves of Psidium guajava

Nat Prod Res. 2007 Jul 10;21(8):742-8. doi: 10.1080/14786410601083712.

Authors

Sabira Begum¹, Syed Nawazish Ali, Syed Imran Hassan, Bina S Siddiqui

Affiliation

¹ H.E.J. Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi 75270, Pakistan. sabira@khi.comsats.net.pk

PMID: 17616904
DOI: 10.1080/14786410601083712

Abstract

One new pentacyclic triterpenoid psidiumoic acid (5) along with four known compounds beta-sitosterol (1), obtusol (2), oleanolic acid (3), and ursolic acid (4) have been isolated from the leaves of Psidium guajava. The new constituent 5 has been characterized as 2 alpha-glycolyl-3beta-hydroxyolean-12-en-28-oic acid through 2D NMR techniques. This is the first report of isolation of compound 2 from the genus Psidium.

MeSH terms

Ethylene Glycols / chemistry
Ethylene Glycols / isolation & purification*
Molecular Structure
Nuclear Magnetic Resonance, Biomolecular
Plant Extracts / chemistry*
Plant Leaves / chemistry
Psidium / chemistry*
Spectrometry, Mass, Fast Atom Bombardment
Spectrophotometry, Infrared
Spectrophotometry, Ultraviolet
Triterpenes / chemistry
Triterpenes / isolation & purification*

Substances

Ethylene Glycols
Plant Extracts
Triterpenes