Mass-spectrometric structure elucidation of dog bile azopigments as the acyl glycosides of glucopyranose and xylopyranose.

@article{Compernolle1971MassspectrometricSE,
  title={Mass-spectrometric structure elucidation of dog bile azopigments as the acyl glycosides of glucopyranose and xylopyranose.},
  author={Frans Compernolle and Georg van Hees and Johan Fevery and Karel P. M. Heirwegh},
  journal={The Biochemical journal},
  year={1971},
  volume={125 3},
  pages={
          811-9
        }
}
1. The structures of the alpha(2)- and alpha(3)-azopigments, prepared by diazotization of dog bile with ethyl anthranilate, were shown by mass spectrometry and g.l.c. to correspond to azobilirubin beta-d-xylopyranoside and azobilirubin beta-d-glucopyranoside respectively. 2. Both azopigments consist of a mixture of two methyl vinyl isomers having structures (IIIa) and (IIIb) for the alpha(2)-azopigment and structures (IVa) and (IVb) for the alpha(3)-azopigment. Separation of methyl vinyl… Expand
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