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  • 1
    Electronic Resource
    Electronic Resource
    Reducing the coumarin content of tonka bean extracts using supercritical CO2 (1996)
    Oxford BSL : Blackwell Science Ltd
    International journal of food science & technology 31 (1996), S. 0 
    Details
    ISSN: 1365-2621
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: By supercritical fluid CO2 extraction of tonka beans a lipophilic top phase and a crystalline base phase were obtained. These were analysed by gas chromatography-mass spectrometry (GC/MS) and high-performance liquid chromatography (HPLC) and compared with an ethanolic extract of the same batch of tonka beans. It was shown that the three samples differed considerably in their composition and that the bulk of the main compound coumarin was present in the base phase of the CO2 extraction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.1996.19-319.x
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  • 2
    Electronic Resource
    Electronic Resource
    HPLC analysis of tonka bean extracts (1995)
    Springer
    European food research and technology 201 (1995), S. 278-282 
    Details
    ISSN: 1438-2385
    Source: Springer Online Journal Archives 1860-2000
    Topics: Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Based on the results of GC-MS analysis, an HPLC procedure was developed for the determination of coumarin, dihydrocoumarin, melilotic acid (o-dihyd-rocoumaric acid), methyl melilotate, ethyl melilotate, 5-hydroxymethylfurfural ando-coumaric acid which are characteristic compounds of tonka beans. The presence of melilotic acid and ethyl melilotate in tonka beans has not been reported previously. Following HPLC analysis of tonka bean extracts produced in the laboratory and one sample of commercially available tonka bean absolute, evidence was provided that solvents used for production are decisive for the kind and amount of the compounds detected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01193004
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  • 3
    Electronic Resource
    Electronic Resource
    Megastigmanes and Other Constituents of the Absolute of Boronia megastigma from Tasmania (1994)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1994 (1994), S. 1043-1047 
    Details
    ISSN: 0170-2041
    Keywords: Boronia megastigma ; Rutaceae ; Megastigm-7-en-9-ones ; Coumarates ; 5-Hydroxygeranyl derivatives ; 8-Hydroxylinalool derivatives ; N-[2-(4-Prenyloxyphenyl)ethyl] tiglamide ; Odoriferous substances ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Some low-volatile constituents of the absolute of Boronia megastigma (Rutaceae) from Tasmania were isolated and characterized. Besides β-ionone (1) and many of its derivatives, e.g. 2-7, we isolated the isomeric 3-hydroxymegastigm-7-en-9-ones 8-10 and the megastigm-7-ene-3,9-dione (11). Furthermore, the p-coumaric acid derivatives (E, Z)-12 and -13, alkyl esters of 8-hydroxylinalool (16a-g) and the N-[2-(4-prenyloxyphenyl)ethyl]tiglamide (17) were identified.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.199419941015
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    Paper (German National Licenses)
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