16-(1,1-Dimethyl-2-propenyl)-11a-hydroxy-6,6-dimethyl-11,11a,16,16a-tetrahydro-5H-indolo[3''',2''':4'',5'']azocino[1'',2'':4',5']pyrazino[2',1':5,1]pyrrolo[2,3-b]indole-10,18(6H,10aH)-dione AIDS-131587 AIDS131587 NSC624214 Okaramine A