. . . . . "Stercobilinogen" . . . . . "stercobilinogen" . . "Stercobilinogen" . "Fecal urobilinogen" . . . . . . "3-[2-[[3-(2-carboxyethyl)-5-[[(2S,3R,4R)-4-ethyl-3-methyl-5-oxopyrrolidin-2-yl]methyl]-4-methyl-1H-pyrrol-2-yl]methyl]-5-(2S,3R,4R)-3-ethyl-4-methyl-5-oxopyrrolidin-2-yl]methyl]-4-methyl-1H-pyrrol-3-yl]propanoic acid" .