(1'R,2'R,3aS,3“aS,8aR,8”aR)-(+)-3,3“,3a,3”a,8,8“,8a,8”a-八氢双螺{2H-茚并[1,2-d]噁唑-2,1'-环己烷-2',2“-[2H]茚并[1,2-d]噁唑}