78456-37-8 CHAPARRINONE, 15-SENECIOYL- NSC330503 Picras-3-ene-2,16-dione, 11,20-epoxy-1,11,12-trihydroxy-15-[(3-methyl-1-oxo-2-butenyl)oxy]-, (1.beta.,11.beta.,12.alpha.,15.beta.)-