(3aR,4R,7R,8S,9S,10R,11R,13R,15R,15aR)-11-Benzyloxy-4-ethyl-8,10-dihydroxy-3a,7,9,11,13,15-hexamethyl-2-phenyl-decahydro-1,3,5-trioxa-cyclopentacyclotetradecene-6,14-dione