J. Chem. Inf: Comput. Sci. 1980, 20, 1-6
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Chemical Structure Searching in Derwent’s World Patents Index? STUART M. KABACK Information Research and Analysis Unit, Analytical and Information Division, Exxon Research and Engineering Company, Linden, New Jersey 07036 Received June 7, 1979 Derwent’s World Patents Index (WPI) contains information on general chemicals since 1970 and on pharmaceutical, agricultural, and polymer-related chemicals since different points in the 1960s. Chemical products and significant components of chemical formulations are indexed for structural retrieval by a variety of codes and terms. Foremost among them are the Farmdrx-Agdoc
