2-hydroxy-2,3,4,5,6,8,9,10-octahydro-7h-2,6-methano-1-benzoxocin-7-one (en)2,6-methano-7h-1-benzoxocin-7-one, 2,3,4,5,6,8,9,10-octahydro-2-hydroxy- (en)