Showing structure for (2s,3's,4ar,5r,6r,8ar)-5-[(1r)-1-(acetyloxy)-2-carboxyethyl]-2-[furan-3-yl({[(2r,3r,4s,5s,6s)-3,4,5-trihydroxy-6-methoxyoxan-2-yl]oxy})methyl]-6-(2-hydroxypropan-2-yl)-2,5,8a-trimethyl-8-oxo-tetrahydro-3h-spiro[naphthalene-1,2'-oxirane]-3'-carboxylic acid