alexa Tetracyclic triterpenoids from the leaves of Azadirachta indica.


Journal of Food Processing & Technology

Author(s): Siddiqui BS, Afshan F, Gulzar T, Hanif M

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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. This article was published in Phytochemistry and referenced in Journal of Food Processing & Technology

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