Pyrazino(1'',2'':1,5;4'',5'':1',5')dipyrrolo(2,3-b:2',3'-b')diindole-7,15(5H,7aH)-dione, 5a,13a-bis(1,1-dimethyl-2-propenyl)-5a,8,8a,13,13a,15a,16,16a-octahydro-8a,16a-dihydroxy-, (5aalpha,7aalpha,8abeta,13abeta,15aalpha,16aalpha)-