Purity ~98% (HPLC). A cell-permeable 2'-benzyloxy griseofulvin derivative that displays enhanced mammalian cancer-selective toxicity (IC50 ≤2, ≤4, ≤12, and ≥30uM against panels of leukemia, myeloma, solid tumors, and non-malignant cell lines, respectively), but little antifungal activity, by activating spindle-assembly-checkpoint without affecting microtubule kinetochore attachment. Cancer cells are reported to undergo multipolar (MP) mitosis with normal or supernumerary centrosomes in the presence of GF-15, resulting in subsequent apoptotic cell death. Shown to retard HT29 colon cancer & OPM2 myeloma tumor expansion in mice (20mg/kg/day i.p.) in vivo. GF-15 half-life is expected to be least 48h in cultures. Solubility: DMSO Molar Mass: 428.9