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2001 (1)
1997 (1)
1Author    M. Aique, W. Biavatti3, PauloC. Vieira3, M. Fatima, G. F. Da Silva3, JoäoB. Fernandes3, Sergio Albuquerque1, Ribeiräo Preto, SäoPaulo BrazilRequires cookie*
 Title    Limonoids from the Endemic Brazilian Species Raulinoa echinata  
 Abstract    Phytochemical survey of stems and leaves of the South Brazilian endemic Raulinoa echi­ nata Cowan, Rutaceae led to the isolation of five limonoid derivatives: the widespread li-monin, limonexic acid, kihadalactone B, a m ethoxylated limonexic acid derivative and a degraded limonoid structurally related to fraxinellone. The two latter com pounds have been isolated for the first time. These compounds displayed weak inhibitory activity when assayed in vitro against trypomastigote forms of Trypanosoma cruzi. In this paper, the isolation, structure elucidation and bioactivity of these compounds are reported. 
  Reference    Z. Naturforsch. 56c, 570—5 (2001); received March 24 2001 
  Published    2001 
  Keywords    Raulinoa echinata, Limonoids, Trypanosoma cruzi 
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 TEI-XML for    default:Reihe_C/56/ZNC-2001-56c-0570.pdf 
 Identifier    ZNC-2001-56c-0570 
 Volume    56 
2Author    H.-OK. Alinow, C. K. Rack3, K. E. Rm Elb, H. Riath, Am JareebRequires cookie*
 Title    Isolation and Characterization of l-Tigloyl-3-acetylazadirachtol from the Seed Kernels of the Thai Neem Azadirachta siamensis Valeton  
 Abstract    The Thai neem A. siamensis (Valeton) is the main source for botanical insecticides in Thailand. Although azadirachtin A (aza A) is present in Thai neem, there are som e other related compounds which may contribute to its bioefficiency. Analytical HPLC of Thai neem samples showed a peak closely eluted with azadirachtin. A large-scale cleanup involving two liquid/liquid extraction steps, silica filtration, and finally two successive preparative HPLC separations, resulted in the pure compound, which was identified as l-tigloyl-3-acetylazadi-rachtol by ID -and 2D -'H and 13C NM R spectroscopy. 
  Reference    Z. Naturforsch. 52b, 1413—1417 (1997); received August 4 1997 
  Published    1997 
  Keywords    Thai N eem, Azadirachtin, Limonoids, NM R Spectra, Structure 
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 TEI-XML for    default:Reihe_B/52/ZNB-1997-52b-1413.pdf 
 Identifier    ZNB-1997-52b-1413 
 Volume    52