3-{[({[(4aR,5aR,6R)-4-(Dimethylamino)-3,6,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo-1,4,4a,5,5a,6,11,12a-octahydrotetracen-2-yl]carbonyl}amino)methyl]amino}phthalic acid AIDS-051079 AIDS051079 NSC43891