On the Existence of a Mono-Vinyl d -Urobilin
- 1 May 1974
- journal article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 71 (5) , 1599-1601
- https://doi.org/10.1073/pnas.71.5.1599
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, C 33 H 40 -N 4 O 6 , 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
This publication has 9 references indexed in Scilit:
- Structure of d-urobilinBiochemical Journal, 1972
- [Degradation of bile pigments with chromic acid and chromate].1969
- Mass spectrometry and ferric chloride oxidation applied to urobilinoid structuresArchives of Biochemistry and Biophysics, 1969
- Gold from Dross: The First Century of the UrobilinoidsAnnals of Internal Medicine, 1969
- BILIRUBIN AND UROBILINS IN GERMFREE, EX-GERMFREE, AND CONVENTIONAL RATSThe Journal of Experimental Medicine, 1960
- Composition of the urobilin group in urine bile, and feces and the significance of variations in health and disease.1959
- A FURTHER STUDY OF CRYSTALLINE d-UROBILINJournal of Biological Chemistry, 1956
- THE ISOLATION OF CRYSTALLINE d-UROBILINOGENJournal of Biological Chemistry, 1956
- THE EFFECT OF AUREOMYCIN ON UROBILINOGEN FORMATION AND THE FECAL FLORA1951