68161-16-0 AIDS-128556 AIDS128556 NSC286715 Spiro(9H-fluorene-9,3'-pyrrolidine)-2',5'-dione, 1'-(4-morpholinylmethyl)- {Spiro[9H-fluorene-9,3'-pyrrolidine]-2',} 5'-dione, 1'-(4-morpholinylmethyl)-