Isolation of a tetranortriterpenoid from Azadirachta indica
作者:Salimuzzaman Siddiqui、Bina S. Siddiqui、Shaheen Faizi、Tariq Mahmood
DOI:10.1016/0031-9422(84)83037-x
日期:1984.1
Abstract A new tetranortriterpenoid, nimocinol has been isolated from the undried winter leaves of Azadirachta indica. Its structure has been determined as 6α-hydroxyazadirone through comparison of its spectral data with those of related meliacins and chemical studies.
Structure of nimonol from fresh whole green leaves of Azadirachta indica
作者:G. Suresh、N.S. Narasimhan、N. Palani
DOI:10.1016/s0031-9422(97)00038-1
日期:1997.6
Nimonol was obtained from the fresh green whole leaves of Azadirachta indica and its structure has been reassigned on the basis of COSY, NOESY and H-1 NMR spectral data. 6-Acetylnimonol was identified as 6-acetoxyazadirone and dihydronimonol was shown to be identical to isomeldenin. The mp and H-1 NMR spectra of 6-acetylnimocinol were markedly different from those of 6-acetoxyazadirone showing that nimocinol and nimonol have different structures. (C) 1997 Elsevier Science Ltd.