Two new triterpenoids from the fresh leaves of Psidium guajava.

@article{Begum2002TwoNT,
  title={Two new triterpenoids from the fresh leaves of Psidium guajava.},
  author={S. Rukshana Begum and Syed Imran Hassan and Bina Shaheen Siddiqui},
  journal={Planta medica},
  year={2002},
  volume={68 12},
  pages={1149-52}
}
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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