(2S,5S,18S,1R,15R,19R)-18-{3-[3,5-Dihydroxy-6-methyl-4-(3,4,5-trihydroxyperhydro-2H-pyran-2-yloxy)perhydro-2H-pyran-2-yloxy]-4,5-dihydroxyperhydro-2H-pyran-2-yloxy}-19-(hydroxymethyl)-1,2,8,8,15,19-hexamethylpentacyclo[12.8.0.0<2,11