1-(3-Furyl)-3b,6,6,9a,11a-pentamethyl-2,7-dioxo-1,2,2a,3b,4,5,5a,6,7,9a,9b,10,11,11a-tetradecahydronaphtho[1',2':6,7]indeno[1,7a-b]oxiren-4-yl acetate AIDS-160461 AIDS160461 NSC630597