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[Correlative analysis of chemical structure - biological activity using Hansch's method: principles and development of the method].

The basic principles and developments on which the Hansch multiple parameter approach depends are described. A correlation analysis on the antibacterial activity of 2-Y-4-(X-phenyl)-3H-1,5-benzodiazepines is discussed. The use of indicator varioables is shown to greatly increase one's ability to formulate quantitative structure-activity relationships. This approach allows one to carry out objective studies of massive amounts of chemical and biological data.