1,4-Epoxy-1H-naphtho(1,2-c)pyran-8-carboxylic acid, 1-(3-(acetyloxy)tetrahydro-5-methylene-2,4-dioxo-3-furanyl)-3,4,4a,6a,7,8,9,10,10a,10b-decahydro-4,10b-dimethyl-3-(1-methyl-1-propenyl)-, (1S-(1alpha,1(S*),3beta(E),4alpha,4abeta,6abeta,8alpha,10aalpha,10bbeta))-