Antioxidant flavonoid. Antitumor compound. Induces cell cycle arrest in the G2/M-phase. Alternative name: 3,4',5,7-Tetrahydroxy-3',5'-dimethoxyflavylium chloride. Purity: ≥97% (HPLC). Solubility: Soluble in 100% ethanol; slightly soluble in water. Long Term Storage: +4°C.