Abstract The inhibition of ABC (ATP binding cassette) transporters is considered a powerful tool to reverse multidrug resistance. Zosuquidar featuring a difluorocyclopropyl-annulated dibenzosuberyl moiety has been found to be an inhibitor of the P-glycoprotein, one of the best-studied multidrug efflux pumps. Twelve 5-oxyisoquinoline derivatives, which are analogues of zosuquidar wherein the dibenzosuberyl-piperazine moiety is replaced by ...
[Barnett, Charles J.; Huff, Bret; Kobierski, Michael E.; Letourneau, Michael; Wilson, Thomas M. Journal of Organic Chemistry, 2004 , vol. 69, # 22 p. 7653 - 7660]