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bile pigment

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heterocyclic compounds

  • sulfur-containing heterocycles
    In heterocyclic compound: Five-membered rings with one heteroatom

    The bile pigments are formed by decomposition of the porphyrin ring and contain a chain of four pyrrole rings. Bilirubin, for example, the brownish yellow pigment that gives feces its characteristic colour, is the end product of the breakdown of heme from destroyed red blood cells.

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