| urobilinogen | <chemical> A colourless compound formed in the intestines by the reduction of bilirubin. Some is excreted in the feces where it is oxidised 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 oxidised to urobilin. Chemical name: 21H-Biline-8,12-dipropanoic acid, 2,17-diethyl-1,4,5,10,15,16,19,22,23,24-decahydro-3,7,13,18-tetramethyl-1,19-dioxo- (12 Dec 1998) |
|---|---|
| urobilinogen IXa | A reduced mesobilirubin with no double bonds between the pyrrole rings and, consequently, colourless. See: bilirubinoids. Synonym: mesobilirubinogen, urobilinogen IXa. (05 Mar 2000) |