Chemicals and Drugs

Urobilinogen

A colorless compound formed in the intestines by the reduction of bilirubin. Some is excreted in the feces where it is oxidized to urobilin. Some is reabsorbed and re-excreted in the bile as bilirubin. At times, it is re-excreted in the urine, where it may be later oxidized to urobilin.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A colorless compound formed in the intestines by the reduction of bilirubin. Some is excreted in the feces where it is oxidized to urobilin. Some is reabsorbed and re-excreted in the bile as bilirubin. At times, it is re-excreted in the urine, where it may be later oxidized to urobilin.

Chemical Identity

Chemical Information

Molecular Formula
C33H44N4O6
Molecular Weight
592.7 g/mol
CAS Registry No.
14684-37-8
IUPAC Name
3-[2-[[3-(2-carboxyethyl)-5-[(3-ethyl-4-methyl-5-oxo-1,2-dihydropyrrol-2-yl)methyl]-4-methyl-1H-pyrrol-2-yl]methyl]-5-[(4-ethyl-3-methyl-5-oxo-1,2-dihydropyrrol-2-yl)methyl]-4-methyl-1H-pyrrol-3-yl]propanoic acid
InChIKey
OBHRVMZSZIDDEK-UHFFFAOYSA-N
SMILES
CCC1=C(C(=O)NC1CC2=C(C(=C(N2)CC3=C(C(=C(N3)CC4C(=C(C(=O)N4)CC)C)C)CCC(=O)O)CCC(=O)O)C)C
MeSH Unique ID
D014558
Source
PubChem CID 26818

MeSH Record

Classification

Broader headings

Related Concepts

Knowledge Graph

Loading graph…

Drag nodes to rearrange; hover to trace links; click a node to open its page.

MeSH Record

Aspects Covered

28 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analysis, antagonists & inhibitors, biosynthesis, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, deficiency, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, urine.

MeSH Record

Indexing Annotation

a bile pigment; /biosyn /physiol permitted

MeSH Hierarchy

Tree Numbers

  1. D03w.383.129w.578.840w.249w.852w
  2. D03w.633.400.909w.249w.852w
  3. D04w.345w.783w.249w.852w
  4. D23.767w.193w.852w

AMA Style

References

  1. National Library of Medicine. Urobilinogen. Medical Subject Headings (MeSH). 2026. Unique ID D014558. http://id.nlm.nih.gov/mesh/2026/D014558
  2. Urobilinogen. In: Wikipedia. https://en.wikipedia.org/wiki/Urobilinogen
  3. Urobilinogen. In: Wikidata. https://www.wikidata.org/wiki/Q57054
  4. Urobilinogen. In: PubChem Compound. CID 26818. https://pubchem.ncbi.nlm.nih.gov/compound/26818