Chemical constituents from the leaves of Psidium guajava

Sabira Begum H.E.J. Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi-75270, Pakistan

Syed Imran Hassan H.E.J. Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi-75270, Pakistan

Syed Nawazish Ali H.E.J. Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi-75270, Pakistan

Bina S. Siddiqui H.E.J. Research Institute of Chemistry, International Center for Chemical Sciences, University of Karachi, Karachi-75270, Pakistan

Abstract

Five constituents including one new pentacyclic triterpenoid guajanoic acid (1) and four known compounds β-sitosterol (2), uvaol (3), oleanolic acid (4), and ursolic acid (5) have been isolated from the leaves of Psidium guajava.The new constituent1has been characterized as 3β-p-E-coumaroyloxy-2α-methoxyurs-12-en-28-oic acid through 2D NMR techniques and chemical transformations. This is the first report of isolation of compound 3 from the genus Psidium

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Chemical constituents from the leaves of Psidium guajava

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Chemical constituents from the leaves of Psidium guajava

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