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Phytochemistry. 2004 Aug;65(16):2363-7.

Tetracyclic triterpenoids from the leaves of Azadirachta indica.

Author information

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

Abstract

Two new tetracyclic triterpenoids zafaral [24,25,26,27-tetranorapotirucalla-(apoeupha)-6alpha-methoxy-7alpha-acetoxy-1,14-dien-3,16-dione-21-al] (1) and meliacinanhydride [24,25,26,27-tetranorapotirucalla-(apoeupha)-6alpha-hydroxy,11alpha-methoxy-7alpha,12alpha-diacetoxy,1,14,20(22)-trien-3-one] (2) have been isolated from the methanolic extract of neem leaves along with two known constituents nimocinol and isomeldenin. Their structures and the relative configurations were determined by spectroscopic methods ((1)H and (13)C NMR, IR, and MS) and 2D NMR experiments.

PMID:
15381008
DOI:
10.1016/j.phytochem.2004.04.031
[Indexed for MEDLINE]

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