- Facile preparation of symmetric bilirubins IIIα and XIIIα from IXα
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Improved, simple precedures for synthesis and isolation of symmetrically substituted bilirubin-XIIIα and bilirubin-IIIα from the natural pigment, bilirubin-IXα, are described.
- Ma,Lightner
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p. 1005 - 1008
(2007/10/02)
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- Chromatographic Separation and Spectroscopic Characterization of the Bilirubin Isomers IIIα, IXα, XIIIα, and Their Dimethyl Esters
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The three structural isomers bilirubin IXα (1a), IIIα (2a), and XIIIα (3a) have been separated on a preparative scale by high-performance low-pressure liquid chromatography.They were converted into their dimethyl esters 1b, 2b, and 3b and characterized by UV, IR, MS, and full assigned 1H NMR data.NMR is the only spectroscopic method which makes it possible to analyze mixtures of the three isomeric dimethyl esters quantitatively.
- Defoin-Straatmann, Rosalie,Defoin, Albert,Kuhn, Hans Joachim,Schaffner, Kurt
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p. 1759 - 1765
(2007/10/02)
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