Butanoic acid, 4-[[[[[4-(dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,6,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo-2-naphthacenyl]carbonyl]amino]methyl]amino]-, monosodium salt, (4.alpha.,4a.alpha.,5a.alpha.,6.beta.,12a.alpha.)-(.+-.)- Butyric acid, DL-4-[[[4-(dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,6,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo-2-naphthacenecarboxamido]methyl]amino]-, sodium salt NSC56714