Selective MRP (multidrug resistance-associated protein) 4 inhibitor (IC50 = 2.6 μM). Selective for MRP4 over P-gp, MRP1 and ABCG2. Sensitizes MRP4 over-expressing cells to SN 38 .
Cheung et al (2014) High-throughput screening identifies Ceefourin 1 and Ceefourin 2 as highly selective inhibitors of multidrug resistance protein 4 (MRP4). Biochem.Pharmacol. 91 97 PMID:24973542
















