Butanoic acid, 3-hydroxy-2-methyl-, 3,5,11-tris(acetyloxy)-1,2,3,4,4a,5,6,7,8,11,12,12a-dodecahydro-9,12a,13,13-tetramethyl-4-methylene-6,10-methanobenzocyclodecen-7-yl ester, (3S-(3alpha,4aalpha,5alpha,6beta,7beta(2S*,3R*),11beta,12abeta))-