Resveratrol is a natural polyphenolic antioxidant that has anti-cancer properties. CAY10616 is an analog of resveratrol which potently induces apoptosis in promyelocytic leukemia HL-60 cells (IC50 = 40 nM, vs. 50 μM for resveratrol). In addition, CAY10599 induces apoptosis (IC50 = 30 nM) in HL-60R, a cell line derived from HL-60 that expresses a multidrug-resistance phenotype (resistant to daunorubicin, etoposide, and citarabine).