Two new triterpenoids from the fresh leaves of Psidium guajava |
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| Authors: | Begum Sabira Hassan Syed Imran Siddiqui Bina S |
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| Affiliation: | H. E. J. Research Institute of Chemistry, International Centre for Chemical Sciences, University of Karachi, Pakistan. sabira@khi.comsats.net.pk |
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| 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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