4,19-Dioxabicyclo[13.3.1]nonadecan-3-one,1,11,17-trihydroxy-10,18-dimethoxy-2,14,16-trimethyl-5-phenyl-,[1R-(1R*,2S*,5S*,10S*,11R*,14S*,15S*,16S*,17S*,18R*)]-