2-{6-[(2-{5'-[6-hydroxy-6-(hydroxymethyl)-3,5-dimethyltetrahydro-2h-pyran-2-yl]-2,3'-dimethyloctahydro-2,2'-bifuran-5-yl}-9-methoxy-2,4,10-trimethyl-1,6-dioxaspiro[4.5]dec-7-yl)methyl]-3-methyltetrahydro-2h-pyran-2-yl}propanoic acid