6-Asoc 6alpha-Senecioyloxychaparrin 82151-95-9 Picras-3-en-16-one, 11,20-epoxy-1,2,11,12-tetrahydroxy-6-((3-methyl-1-oxo-2-butenyl)oxy)-, (1beta,2alpha,6alpha,11beta,12alpha)-