Parthenolide Synonym: (1S,2R,4R,7E,11S)-4,8-dimethyl-12-methylidene-3,14-dioxatricyclo[9.3.0.02,4]tetradec-7-en-13-one. Chemical Formula: C15H20O3 CAS number: 20554-84-1 DOI: 10.1111/bph.13917