Tautomer Processing in the Beilstein Registry System

  • S. H. Welford
Conference paper


In a previous presentation [1] we described the Beilstein Registry Connection Table (BRCT) for organic compounds. This consists of a “list of lists”; certain lists are obligatory for each structure, eg. the “from” list which describes the connectivity of the structure graph, while other lists are optional and are only present when necessary, eg. non-Carbon atoms, charges and abnormal masses. In addition, a group of lists describes the configuration, when known, of asymmetric atoms and double bonds; another group of lists contains information about the tautomerism of the structure.


Tautomeric Form Registry Number Registry File Hash Code Proton Migration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. [1]
    SM Welford, “Die Datenstruktur des Beilstein für organische Verbindungen”, Hochfilzen, 19–21 November, 1986.Google Scholar
  2. [2]
    J Mockus and RE 0Stobaugh, “The Chemical Abstracts Service Chemical Registry System. VII. Tautomerism and Alternating Bonds”, J. Chem. Inf. Comput. Sci. 20(1) 1980, pp 18–22.CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1988

Authors and Affiliations

  • S. H. Welford
    • 1
  1. 1.Beilstein InstitutFrankfurt/M. 90Germany

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