AIDS-138609 AIDS138609 Dispiro[furan-3(2H),2'(5'H)-furan-5',1''(2''H)-naphthalen]-3''(4''H)-one, 3',4',4''a,5'',6'',7'',8'',8''a-octahydro-2'',5'',5'',8''a-tetramethyl- NSC645754 Prehispanolone