4,9,11-Cyclopentacycloundecenetriol,1,2,3,3a,4,7,8,9,10,11,12,12a-dodecahydro-6-(hydroxymethyl)-1-(1-hydroxy-1-methylethyl)-3a-methyl-10-methylene-,(1R*,3aS*,4S*,5E,9S*,11R*,12aS*)-(-)-