.delta.6-Coprinolone 3,8b-Methano-8bH-cyclobuta[5,6]benzo[1,2-b]pyran-5(7H)-one, 2,3,4,4a,8,8a-hexahydro-9-hydroxy-3,6,8a-trimethyl- AIDS-133849 AIDS133849 NSC630672