3,19-Dioxo-14-hydroxycarda-4,20(22)-dienolide 3566-39-0 4-18-00-02663 (Beilstein Handbook Reference) 4-Anhydrostrophanthidone BRN 0060986 Carda-4,20(22)-dienolide, 3,19-dioxo-14-hydroxy- delta(sup 4)-Anhydrostrophanthidone