1,3-Dioxolane-2-carboxylic acid, 2,4-dimethyl-5-(7-oxo-7-((tetrahydro-2-methyl-6-(1,2,3,4,4a,7,12,12b-octahydro-2,3,4a,8,12b-pentahydroxy-3-methyl-1,7,12-trioxobenz(a)anthracen-9-yl)-2H-pyran-3-yl)oxy)-1,3,5-heptatrienyl)-, (2alpha,3alpha,4aalpha,9(