Showing structure for (2s)-4-[(1r,3r,4ar,5s,6r,8s,8ar)-5-[(2s,3ar,6as)-hexahydrofuro[2,3-b]furan-2-yl]-8-(acetyloxy)-3-hydroxy-5,6-dimethyl-hexahydro-2h-spiro[naphthalene-1,2'-oxiran]-8a-ylmethoxy]-4-oxobutan-2-yl (3s)-3-(acetyloxy)butanoate