Medellin DC, Zhou Q, Scott R, Hill RM, Frail SK, Dasari R, Ontiveros SJ, Pelly SC, van Otterlo WA, Betancourt T, Shuster CB, Hamel E, Bai R, LaBarbera DV, Rogelj S, Frolova LV, Kornienko A. Novel Microtubule-Targeting 7-Deazahypoxanthines Derived from Marine Alkaloid Rigidins with Potent in Vitro and in Vivo Anticancer Activities. J Med Chem. 2016 Jan 14; 59(1):480-5.