Inhibition of rat hepatic microsomal aminopyrine N-demethylase activity by benzimidazole derivatives. Quantitative structure-activity relationships

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Abstract
Benzimidazole derivatives (82) were prepared and tested for the ability to inhibit cytochrome P-450 mediated enzyme activity (aminopyrine N-demethylase) from phenobarbitone-induced rat hepatic microsomes. Using physicochemical parameters and multiple regression analysis, a quantitative structure-activity relationship (QSAR) that describes up to 87% of the data variance in terms of hydrophobic and electronic effects and the molar refractivity of the substituent in the 2-position of the benzimidazole ring was described.