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