NSC-609249 drochloride is an impurity of Verapamil (P-glycoprotein (P-gp) inhibitor[1][2].
[1]. Gowarty JL, et al. Verapamil as a culprit of palbociclib toxicity. J Oncol Pharm Pract. 2019 Apr;25(3):743-746.
[2]. Krikler DM. Verapamil in arrthmia. Br J Clin Pharmacol. 1986;21 Suppl 2:183S-189S.
















