Urobilin 3945963 214066796 2008-05-21T23:34:25Z Rodrigouf 103086 {{Chembox new |ImageFile=D-Urobilin.svg |ImageSize=250px |IUPACName= |OtherNames= |Section1= {{Chembox Identifiers | CASNo=1856-98-0 | PubChem=6433298 | SMILES= | MeSHName=Urobilin }} |Section2= {{Chembox Properties | Formula=C<sub>33</sub>H<sub>42</sub>N<sub>4</sub>O<sub>6</sub> | MolarMass=590.71 | Appearance= | Density= | MeltingPt= | BoilingPt= | Solubility= }} |Section3= {{Chembox Hazards | MainHazards= | FlashPt= | Autoignition= }} }} {{context}} '''Urobilin''' is a yellow linear tetrapyrrole, resulting from the breakdown of [[haem]], a cyclic tetrapyrrole. Urobilin is generated in intestines from [[urobilinogen]]. It is absorbed into blood stream and excreted in urine, giving urine its characteristic yellow color. It is a sensitive marker for early acute hepatitis. ==External links== {{Tetrapyrroles}} [[Category:Pigments]] [[Category:Tetrapyrroles]] [[de:Urobilin]] [[es:Urobilina]] [[it:Urobilina]] {{color-stub}} {{biochem-stub}} {{heterocyclic-stub}}