A dimeric sesquiterpene, gochnatiolide A

THE TITLE COMPOUND [SYSTEMATIC NAME: 5'a-hydroxy-1',3,6,8'-tetrakis(methylene)-3a,4,5,5',5'a,6,6',6a,7,7',7'a,8',9a,9b,10'a,10'b-hexadecahydrospiro[azuleno[4,5-b]furan-9(2H),3'-[3H]benz[1,8]azuleno[4,5-b]furan]-2,2',8,9'(1'H,3H,4'H)-tetrone acetone 0.92-solvate], C(30)H(30)O(7)·0.92C(3)H(6)O, is a dimeric sequiterpene formed by a cyclohexane system connecting two monomeric sesquiterpene lactone units of dehydro-zaluzanin C. It was isolated from Ainsliaea henryi.