Berubicin (RTA 744 free base; WP 744) is a 4'-O-benzyldoxorubicin that inhibits P-gp and MRP1-mediated efflux and has anticancer activity. Berubicin inhibits glioblastoma multiforme (GBM) and exhibits cytotoxicity. Berubicin has poor bioavailability in mice.
References:
[1]. Kazerooni R, et al. Phase I clinical pharmacokinetics of RTA 744 (berubicin (B)), a blood-brain barrier penetrating anthracycline active against high grade glioma, and evaluation of its 13-droxy metabolite, berubicinol (B-ol)[J]. Molecular Cancer Therapeutics, 2007, 6(11_Supplement): B101-B101.