Esmat Mohammadinasab*, Meysam Shirmohammadi and Zakiyeh Bayat Pages 1 - 12 ( 12 )
Quantitative structure activity relationship (QSAR) was used to study the partition coefficient of some quinolones and their derivatives. These molecules are broad-spectrum antibiotic pharmaceutics. First, data were divided into two categories of train and test (validation) sets using random selection method. Second, three approaches including stepwise selection (STS) (forward), genetic algorithm (GA), and simulated annealing (SA) were used to select the descriptors, with the aim of examining the effect feature selection methods. To find the relation between descriptors and partition coefficient, multiple linear regression (MLR), principal component regression (PCR) and partial least squares (PLS) were used. QSAR study showed that the both regression and descriptor selection methods have vital role in the results. Different statistical metrics showed that the MLR-SA approach with (r2=0.96, q2=0.91, pred_r2=0.95) gives the best outcome. The proposed expression by MLR-SA approach can be used in the better design of novel quinolones and their derivatives.
QSAR, Lipophilicity, genetic algorithm (GA), MLR, PCR, PLS, Quinolones
Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Department of Chemistry, Quchan Branch, Islamic Azad University, Quchan