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3. For example, during the first four years of the discovery campaign that led to cimetidine, some 200 compounds were synthesized and assessed. Ganellin, C. R. Discovery of the antiulcer drug tagamet. In Drug Discovery and Development (Chorghade, M. S., Ed.), John Wiley & Sons, Inc, Hoboken, New Jersey, Vol. 1, p. 300.
4. Pharmacological screening tests;Smith;Progr. Med. Chem.,1964
5. Drug discovery – today and tomorrow: the role of medicinal chemistry;Freter;Pharmaceut. Res.,1988