2H-3,9a-Methano-1-benzoxepin-4,5,6,7-tetrol,5a-[(acetyloxy)methyl]octahydro-2,2,9-trimethyl-, 4,5,7-triacetate 6-benzoate,[3S-(3a,4b,5a,5aa,6b,7a,9a,9aa)]-