Showing structure for (2s)-4-{[(2s)-4-[(1r,3r,4ar,5s,6r,8s,8ar)-5-[(2s,3as,6as)-2h,3h,3ah,6ah-furo[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]oxy}-4-oxobutan-2-yl (3s)-3-hydroxybutanoate