Record Information
Version1.0
StatusDetected and Quantified
Creation Date2020-12-10 18:50:52 UTC
Update Date2022-08-31 06:10:16 UTC
Metabolite IDMMDBc0000602
Metabolite Identification
Common NameL-Urobilin
DescriptionL-Urobilin belongs to the class of organic compounds known as bilirubins. These are organic compounds containing a dicarboxylic acyclic tetrapyrrole derivative. L-Urobilin is a very strong basic compound (based on its pKa). Many urine tests (urinalysis) monitor the amount of urobilin in urine, as its levels can give insight on the effectiveness of urinary tract function. Darker urine can also be due to other chemicals, such as various ingested dietary components or drugs, porphyrins in patients with porphyria, and homogentisate in patients with alkaptonuria. Some of this remains in the large intestine, and its conversion to stercobilin gives feces its brown color. When urobilinogen is exposed to air, it is oxidized to urobilin, giving urine its yellow color. Bilirubin is then excreted as bile, which is further degraded by microbes present in the large intestine to urobilinogen. It is a linear tetrapyrrole compound that, along with the related compound urobilinogen, are degradation products of the cyclic tetrapyrrole heme. Urobilin is generated from the degradation of heme, which is first degraded through biliverdin to bilirubin. Urobilin or urochrome is the chemical primarily responsible for the yellow color of urine. Obstructive jaundice reduces biliary bilirubin excretion, which is then excreted directly from the blood stream into the urine, giving a dark-colored urine but with a paradoxically low urobilin concentration, no urobilinogen, and usually with correspondingly pale faeces. A lack of water intake, for example following sleep or dehydration, reduces the water content of urine, thereby concentrating urobilin and producing a darker color of urine.
Structure
Synonyms
ValueSource
L-StercobilinHMDB
StercobilinHMDB, MeSH
UrobilinHMDB
Stercobilin III alphaMeSH, HMDB
3-(2-{[(2E)-3-(2-carboxyethyl)-5-[(3-ethyl-5-hydroxy-4-methyl-3,4-dihydro-2H-pyrrol-2-yl)methyl]-4-methyl-2H-pyrrol-2-ylidene]methyl}-5-[(4-ethyl-5-hydroxy-3-methyl-3,4-dihydro-2H-pyrrol-2-yl)methyl]-4-methyl-1H-pyrrol-3-yl)propanoateGenerator
Molecular FormulaC33H46N4O6
Average Mass594.7415
Monoisotopic Mass594.341735224
IUPAC Name3-[(2E)-2-{[3-(2-carboxyethyl)-5-[(4-ethyl-3-methyl-5-oxopyrrolidin-2-yl)methyl]-4-methyl-1H-pyrrol-2-yl]methylidene}-5-[(3-ethyl-4-methyl-5-oxopyrrolidin-2-yl)methyl]-4-methyl-2H-pyrrol-3-yl]propanoic acid
Traditional Namestercobilin
CAS Registry NumberNot Available
SMILES
CCC1C(CC2=N\C(=C\C3=C(CCC(O)=O)C(C)=C(CC4NC(=O)C(CC)C4C)N3)C(CCC(O)=O)=C2C)NC(=O)C1C
InChI Identifier
InChI=1S/C33H46N4O6/c1-7-20-19(6)32(42)37-27(20)14-25-18(5)23(10-12-31(40)41)29(35-25)15-28-22(9-11-30(38)39)17(4)24(34-28)13-26-16(3)21(8-2)33(43)36-26/h15-16,19-21,26-27,34H,7-14H2,1-6H3,(H,36,43)(H,37,42)(H,38,39)(H,40,41)/b29-15+
InChI KeyTYOWQSLRVAUSMI-WKULSOCRSA-N