Popis: |
The gastrin CCK antagonist activity of 67 benzodiazepines has been studied by molecular modelling. Construction and optimisation by GenMol and MOPAC has allowed us to obtain molecules of absolute minimum energy. Five geometrical parameters and pharmacophores were selected for a processing by neural system. They allow a good prediction of activity of a compound belonging to this series: the correlation coefficients are r =0.970 for the calculation and r =0.926 for the prediction. A second database, limited to 23 compounds, constituted by a sample of the precedent one, allowed us, by selecting four parameters to obtain a satisfactory linear and nonlinear correlation for these compounds. The correlation coefficients obtained by neural system are r =0.990 for the calculation and r =0.981 for the prediction. |