Showing structure for (1s,3's,5ar,7ar,8r,9s,11ar,11br)-1-(acetyloxy)-9-[(s)-furan-3-yl({[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy})methyl]-5,5,7a,9,11b-pentamethyl-3,7-dioxo-hexahydro-1h-spiro[naphtho[2,1-c]oxepine-8,2'-oxirane]-3'-carboxylic acid