As it is in most fields of natural product chemistry with a long standing tradition, nomenclature of linear oligopyrroles and bile pigments is rather complicated and inhomogeneous. Although a working party was set up by the Commission for Nomenclature in Organic Chemistry and the Commission for Biochemical Nomenclature, which as a result published recommendations on the nomenclature of tetrapyrroles  and will probably provide revisions in the future, problems will remain.
KeywordsDihedral Angle Numbering Scheme Fundamental System Bile Pigment Natural Product Chemistry
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