Dendral was a project in artificial intelligence (AI) of the 1960s, and the computer software expert system that it produced. Its primary aim was to study hypothesis formation and discovery in science. For that, a specific task in science was chosen: help organic chemists in identifying unknown organic molecules, by analyzing their mass spectra and using knowledge of chemistry. It was done at Stanford University by Edward Feigenbaum, Bruce G. Buchanan, Joshua Lederberg, and Carl Djerassi, along with a team of highly creative research associates and students. It began in 1964 and spans approximately half the history of AI research.

The software program Dendral is considered the first expert system because it automated the decision-making process and problem-solving behavior of organic chemists. Much research to create AI was done during the 20th century.

Also around the mid 20th century, science, especially biology, faced a fast-increasing need to develop a "man-computer symbiosis", to aid scientists in solving problems. For example, the structural analysis of myoglobin, hemoglobin, and other proteins relentlessly needed instrumentation development due to its complexity.

In the early 1960s, Joshua Lederberg started working with computers and quickly became tremendously interested in creating interactive computers to help him in his exobiology research. As he was not an expert in either chemistry or computer programming, he collaborated with Stanford chemist Carl Djerassi to help him with chemistry, and Edward Feigenbaum with programming, to automate the process of determining chemical structures from raw mass spectrometry data.

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References

  1. Berk, A A. LISP: the Language of Artificial Intelligence. New York: Van Nostrand Reinhold Company, 1985. 1-25.
  2. Lederberg, Joshua. An Instrumentation Crisis in Biology. Stanford University Medical School. Palo Alto, 1963.
  3. Lederberg, Joshua. Dendral-64 - a system for computer construction, enumeration and notation of organic molecules as tree structures and cyclic graphs. part i- notational algorithm for tree structures. Interim Report to the National Aeronautics and Space Administration, 15 December, 1964.
  4. Lederberg, Joshua. How Dendral Was Conceived and Born. ACM Symposium on the History of Medical Informatics, 5 November 1987, Rockefeller University. New York: National Library of Medicine, 1987. Alternate link to article
  5. Lindsay, Robert K., Bruce G. Buchanan, Edward A. Feigenbaum, and Joshua Lederberg. Applications of Artificial Intelligence for Organic Chemistry: The Dendral Project. McGraw-Hill Book Company, 1980.
  6. Lindsay, Robert K., Bruce G. Buchanan, E. A. Feigenbaum, and Joshua Lederberg. DENDRAL: A Case Study of the First Expert System for Scientific Hypothesis Formation. Artificial Intelligence 61, 2 (1993): 209-261.
  7. November, Joseph A. “Digitizing Life: The Introduction of Computers to Biology and Medicine.” Doctoral dissertation, Princeton University, 2006
  8. "Mit smarter Software zur Analytik 4.0." CHEManager (GIT Verlag). Accessed 15 October 2025.
  9. "Limitationen von Datenbanken und Möglichkeiten für künstliche Intelligenz." Wiley Analytical Science. Accessed 15 October 2025.
  10. SpecTUS: AI-based Structure Elucidation from Mass Spectrometry. arXiv preprint (2025). Accessed 15 October 2025.