Tolnapersine exhibits multidrug resistance (MDR) reversal activity, which reverses the resistance of tumor cells to multiple chemotherapy drugs by affecting P-glycoprotein (Pgp) on the cell membrane[1].
References
[1] Ramu A, et al., Reversal of multidrug resistance by bis(phenylalkyl)amines and structurally related compounds. Cancer Chemother Pharmacol. 1994;34(5):423-30. DOI:10.1007/BF00685568