Hexadecanoic acid, (6-(2,3-dimethyl-1-oxobutoxy)-1a,2,5,5a,6,9,10,10a-octahydro-5,5a-dihydroxy-1,1,7,9-tetramethyl-11-oxo-10a-((1-oxododecyl)oxy)-1H-2,8a-methanocyclopenta(a)cyclopropa(e)cyclodecen-4-yl)methyl ester