103839-22-1 13,18-Dehydro-6alpha-senecioyloxychaparrin 13,18-Dsoc Picrasa-3,13(21)-dien-16-one, 11,20-epoxy-1,2,11,12-trihydroxy-6-((3-methyl-1-oxo-2-butenyl)oxy)-, (1beta,2alpha,6alpha,11beta,12alpha)-