l-stercobilinogen

l-ster·co·bi·lin·o·gen

(ster'kō-bī-lin'ō-jen),
Reduction product of l-urobilinogen, precursor of l-stercobilin in the final stages of bilirubin metabolism; excreted in feces, wherein it is oxidized to stercobilin.
See also: bilirubinoid.