Nonanoic acid (1S*,3aS*,8R*,11R*,11aS*)-11,11a-dihydroxy-10-(hydroxymethyl)-12-oxo-3a,8-methano-1,4,5,6,7,8,11,11a-octahydro-3aH-cyclopentacyclodecen-1-yl ester