Synonyms: Oxireno[9,10]cyclodeca[1,2-b]furan-9(1aH)-one,2,3,6,7,7a,8,10a,10b-octahydro-1a,5,8-trimethyl-,[1aR-(1aR*,4E,7aS*,8S*,10aS*,10bR*)]-; Parthenolide, dihydro- (6CI,7CI,8CI);11,13-Dihydroparthenolide; 11bH,13-Dihydroparthenolide; Dihydroparthenolide