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  • 1
    Electronic Resource
    Electronic Resource
    Acrophylline and acrophyllidine two new alkaloids from acronychia haplophylla
    Amsterdam : Elsevier
    Tetrahedron Letters 9 (1968), S. 1525-1527 
    Details
    ISSN: 0040-4039
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0040-4039(01)98992-0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Collisional activation decomposition of actinomycins using tandem mass spectrometry (1988)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 16 (1988), S. 67-70 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The collisional activation (xenon) decomposition of actinomycin V, dactinomycin, 7-nitrodactinomycin, 7-aminodactinomycin, and a mixture of dactinomycin, actinomycin C1 and actinomycin C2 was studied using a triple-quadrupole mass spectrometer with fast atom bombardment (xenon) ionization. Fragmentation pathways of the structurally significant ions were rationalized by assuming an initial McLafferty rearrangement at the ester linkage between the methylvaline and the threonine of both rings to form linear pentapeptides, followed by fragmentation in either pentapeptide yielding typical sequence ions and sequence cleavages from both rings.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200160113
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Mass spectra of cyclopenin and viridicatin (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 4 (1970), S. 241-248 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Mass spectra of cyclopenin (I), viridicatin (III), 3-benzylidene-3,4-dihydro-4-methyl-1H-1,4-benzodiazepin-2,5-dione (VI) and derivatives of these systems were measured. Fragmentation schemes are proposed based on high resolution data, metastable peaks and, where appropriate, on deuterium labeling. The decomposition of I is found to follow pathways different in several respects from those proposed by Luckner et al. on the basis of low resolution spectra.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210040128
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Mass spectral rearrangements in benzylidene hippuric esters (1971)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 5 (1971), S. 625-632 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of a series of hippuric esters have been determined. A variety of novel rearrangements induced by the presence of a formed benzyl carbonium ion has been rationalized with the aid of high resolution measurements and isotopic and substituent labeling. An eight centered rearrangement is proposed for the observed transfer of oxygen from a nitro group to a double bond.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210050602
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    Paper (German National Licenses)
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