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. 1974 May;71(5):1599–1601. doi: 10.1073/pnas.71.5.1599

On the Existence of a Mono-Vinyl d-Urobilin

M Chedekel *, F A Bovey †, A I R Brewster †, Z J Petryka ‡, M Weimer ‡, C J Watson ‡, Albert Moscowitz §, D A Lightner
PMCID: PMC388283  PMID: 4525451

Abstract

Chromic acid degradation of a d-urobilin, obtained after incubation of bilirubin in fecal bacterial cultures, gave methylvinylmaleimide and methylethylmaleimide. The d-urobilin, molecular weight 588, C33H40-N4O6, clearly showed the presence of both vinyl and ethyl resonances in the nuclear magnetic resonance spectrum. These results point unambiguously to a urobilin structure with one vinyl and one ethyl beta-substituent.

Keywords: d-urobilin 588, nuclear magnetic resonance, chromic acid oxidation

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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