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IUPAC1) is an abbreviation for "International Union of Pure and Applied Chemistry". IUPAC is an organization that develops standard guidelines for the nomenclature of chemical compounds and publishes the guidelines as recommendations with emphasis on the nomenclature of organic compounds.

Before the foundation of IUPAC2), naming a new compound widely followed the discoverer's own liking and the name frequently reflected on some direct observations. Since these so-called trivial names seldom describe the structure of a compound, it was difficult, if not impossible, to make a reasonable connection between name and structure. Progress and refinement in the area of structure elucidation in organic chemistry pointed to the need for the establishment of a generally accepted systematic nomenclature that finally led to an obligatory set of rules. In most cases these rules allow to make important constitutional statements about a molecule already from the name.

1)IUPAC: International Union of Pure and Applied Chemistry
2)IUPAC: International Union of Pure and Applied Chemistry

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