| Literature DB >> 4525451 |
M Chedekel, F A Bovey, A I Brewster, Z J Petryka, M Weimer, C J Watson, A Moscowitz, D A Lightner.
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.Entities:
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Year: 1974 PMID： 4525451 PMCID： PMC388283 DOI： 10.1073/pnas.71.5.1599
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205