. . "parthenolide" . . . . . "Parthenolide" . . . . . . "Parthenolide" . . . . . . . . . . . . . "(1aR,4E,7aS,10aS,10bR)-2,3,6,7,7a,8,10a,10b-octahydro-1a,5-dimethyl-8-methylene-oxireno[9,10]cyclodeca[1,2-b]furan-9(1aH)-one" .