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  • 1995-1999  (4)
  • 1995  (4)
  • 1,2-bis-Dipyrrinon-9-yl-ethene  (1)
  • 14-Formyl-tripyrrinone  (1)
  • Genotoxicity  (1)
  • Lily  (1)
  • 53 C 25
  • Fenoterol
  • 1
    Electronic Resource
    Electronic Resource
    A novel 16,24-dehydrobiladiene-ab system: The reaction of xanthobilirubic acid methyl ester with bromine (1995)
    Springer
    Monatshefte für Chemie 126 (1995), S. 201-209 
    Details
    ISSN: 1434-4475
    Keywords: 16,24-Dehydrobiladiene-ab ; Biladiene-ab ; Xanthobilirubic acid methyl ester ; Mesobilirubin-XIIIα ; Mesobiliverdin-XIIIα ; 14-Formyl-tripyrrinone ; 15,16-Dimethoxy-biladienes-ab
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Der Umsatz von Xanthobilirubinsäuremethylester mit Brom in Methanol ergibt in 20-prozentiger Ausbeute ein rotes Pigment, für das die bislang nicht bekannte 16,24-Dehydrobiladien-ab-Konstitution abgeleitet wurde. Darüber hinaus konnte das entsprechende Mesobiliverdin-XIIIα, Mesobilirubin-XIIIα, 14-Formyltripyrrinon, und zwei diastereomere 15,16-Dimethoxybiladiene-ab aus der Reaktionsmischung isoliert werden. Die mechanistischen Aspekte dieser Reaktion werden diskutiert.
    Notes: Summary On treating xanthobilirubic acid methyl ester with bromine in methanol, a red bile pigment, which was assigned the hitherto unknown 16,24-dehydrobiladiene-ab constitution, is obtained in 20% yield. In addition, the corresponding mesobiliverdin-XIIIα, mesobilirubin-XIIIα, 14-formyl-tripyrrinone, and two diastereomeric 15,16-dimethoxybiladienes-ab could be isolated from the reaction mixture. The mechanistic aspects of this reaction are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00812248
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    1,2-bis-Dipyrrinon-9-yl-ethene — a novelb-homo-verdian chromophore: the reaction of 9-methyl-10H-dipyrrin-1-ones with bromine (1995)
    Springer
    Monatshefte für Chemie 126 (1995), S. 983-991 
    Details
    ISSN: 1434-4475
    Keywords: 1,2-bis-Dipyrrinon-9-yl-ethene ; b-homo-Verdin ; Mesobiliverdin-XIIIα
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Reaktion von 9-Methyl-10H-dipyrrin-1-onen mit Brom in Dichlormethan ergab in mäßigen Ausbeuten rotgefärbte Gallenfarbstoffderivate. Sie konnten strukturell als 1,2-bis-Dipyrrinon-ethene zugeordnet werden, die ein Beispiel für die bisher unbekanntenb-Homoverdine darstellen. Darüber hinaus konnten aus der Reaktionsmischung die entsprechenden Mesobiliverdine-XIIIα isoliert werden. Die mechanistischen Aspekte dieser Reaktion werden diskutiert.
    Notes: Summary Upon treatment of 9-methyl-10H-dipyrrin-1-ones with bromine in dichloromethane, red bile pigment derivatives were obtained in moderate yields. They were structurally assigned as 1,2-bis-dipyrrinon-9-yl-ethenes, which are examples of the hitherto unknownb-homo-verdins. In addition, the correspondingmeso-biliverdins-XIIIα could be isolated from the reaction mixture. The mechanistic aspects of the reaction are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00811018
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    N-Nitroso-N-M(3-keto-1,2-butanediol)-3′-nitrotyramine A new genotoxic agent derived from the reaction of tyrosine and glucose in the presence of sodium nitrite (1995)
    Springer
    Archives of toxicology 70 (1995), S. 10-15 
    Details
    ISSN: 1432-0738
    Keywords: Key words N-nitroso-N-(3-keto-1 ; 2-butanediol)-3′-nitrotyramine ; Unschedule DNA synthesis ; Genotoxicity ; Initiating agent
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract   N-Nitroso-N-(3-keto-1,2-butanediol)-3′-nitrotyramine (NO-NTA) is a product of a model browning system in the presence of sodium nitrite. In this study, the chemical structure is confirmed by spectral studies, including UV, mass spectrometry, nuclear magnetic resonance and infrared spectroscopy. NO-NTA is strongly genotoxic to the rat hepatocyte and is moderately cytotoxic to mouse C3H10T1/2 cells. Results obtained in this study indicate that NO-NTA inflicted DNA damage through the formation of a DNA adduct. In addition, C3H10T1/2 cells were treated with NO-NTA and, following addition of 12-O-tetradecanoylphorbol-13-acetate (TPA) as promotor, the increase of transformed foci indicated that NO-NTA could possibly be an inhibitor of TPA tumor promotion. A transformed cell line from NO-NTA initiated and TPA promoted foci increased saturation density and growth ability in soft agar reactive to the control line. These results suggest that the formation of a genotoxic agent of nitroso-derivatives may take place in a nitrite-containing food system during processing and cooking.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002040050242
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Immunogold localization of a developmentally regulated, tapetal-specific, 15 kDa lily anther protein (1995)
    Springer
    Protoplasma 189 (1995), S. 17-25 
    Details
    ISSN: 1615-6102
    Keywords: Lily ; Tapetum ; Anther ; Protein ; Immunogold localization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary We have confirmed that the LLA-15 polypeptide ofLilium longiflorum is (a) tapetum specific with some expression possible in the adjacent middle layer cells and (b) relatively abundant as evidenced by the high density of gold particles localized to the tapetal cells. We have established that the protein is cytoplasmic and not associated with organelles, membranes, extracellular matrix or wall. We also report an amino acid composition of the molecule and a partial sequence which bears no resemblance to any protein yet described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01280288
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    Paper (German National Licenses)
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