YHO-13177 is a selective and potent inhibitor of BCRP, it potentiates the cytotoxicity of SN-38 in cancer cells and has no effect on P-glycoprotein–mediated paclitaxel resistance in MDR1-transduced human leukemia K562 cells.

Glafenine hydrochloride is a non-narcotic analgesic and non-steroidal anti-inflammatory drug and an ABCG2 inhibitor with an IC50 of 3.2 μM.

KS176 is a potent and selective inhibitor for the breast cancer resistance protein (BCRP) multidrug transporter with IC50s of 0.59 and 1.39 μM in Pheo A and Hoechst 33342 assays respectively.

Ko 143 is a practical breast cancer resistance protein multidrug transporter inhibitor BCRP, with the EC90 value of 26 nM.

PCI 29732 is a selective and irreversible Btk inhibitor with IC50 of 8.2 nM in a FRET based biochemical enzymology assay.

5,7,3'-Trihydroxy-4'-methoxy-8-prenylflavanone is a natural product isolated and purified from the barks of Azadirachta indica.