(-)-Chaparrinone (1-beta,11-beta,12-alpha)-11,20-Epoxy-1,11,12-trihydroxypicras-3-ene-2,16-dione 22611-34-3 CHAPARRINONE B810280K028 Chaparrinone Chaparrinone (7CI) NSC 288754 Picras-3-ene-2,16-dione, 11,20-epoxy-1,11,12-trihydroxy-, (1-beta,11-beta,12-alpha)-