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