A dimeric sesquiterpene, gochnatiolide A

Abstract

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 30H30O7·0.92C3H6O, 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.