Abstract
Nonplanar 9,10-dihydroacridines were synthesized as promising C2 symmetric molecular scaffolds as inhibitors of the transmembrane efflux pump ABCB1. Within the series structure-activity relationships are discussed revealing the importance of hydrogen bond acceptor functions. A selectivity of ABCB1 inhibition is demonstrated for selected candidates and a bioanalytical study proved nontoxicity as well as missing ABCB1 substrate properties. The results encourage to further develop the promising class of ABCB1 inhibitors.
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