6,10-Methano-2H,8H-1,7-benzodioxacyclododecin-2-one,3,4,5,6,9,10-hexahydro-8,11,13-trihydroxy-12-(1-oxo-3-phenyl-2-propenyl)-8-(2-phenylethenyl)-,[6R*,8R*(E),10R*,12(E)]-(-)-