Structure–activity relationships of novel N-acyloxy-1,4-dihydropyridines as P-glycoprotein inhibitors

Series of novel N-acyloxy-1,4-dihydropyridines have been synthesized and evaluated as P-glycoprotein inhibitors in an in vitro assay to estimate their potential to act as multidrug resistance modulators in cancer cells. Structure–activity relationships are discussed and prove a significant and regiospecific influence of certain functional groups.

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