Showing structure for (3s,4ar,5s,6r,6as,7s,10r,10ar,10br)-5,6-bis(acetyloxy)-7-hydroxy-4a,6a,7,10b-tetramethyl-5'-oxo-1,2,5,6,10,10a-hexahydrospiro[naphtho[2,1-b]pyran-3,3'-oxolan]-10-yl benzoate