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  • Title: Psidials A-C, three unusual meroterpenoids from the leaves of Psidium guajava L.
    Author: Fu HZ, Luo YM, Li CJ, Yang JZ, Zhang DM.
    Journal: Org Lett; 2010 Feb 19; 12(4):656-9. PubMed ID: 20078113.
    Abstract:
    Three novel sesquiterpenoid-based meroterpenoids of psidials A-C (1-3) have been isolated from the leaves of Psidium guajava L. Their complete structures were elucidated by spectral and chemical methods, and that of 1 was confirmed by single-crystal X-ray diffraction analysis. Psidial B (2) and C (3) represented the new skeleton of the 3,5-diformylbenzyl phloroglucinol-coupled sesquiterpenoid. A possible biosynthetic pathway for 2-3 was postulated. 2-3 showed activity to enzyme PTP1B in 10 microM.
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