[3aR-[(3aS*,4S*,6aR*),3aα,6α,7aβ]]-3H-3a,6-methano-2,1-benzisothiazole, hexahydro-8,8-dimethyl-4-[[tetrahydro-1,3-dioxolo-5-(phenylmethyl)-2-oxo-[4,5-c]-pyrrol-4-yl]carbonyl]-2,2-dioxide