(4S-(4 alpha,4a alpha,5 alpha,5a alpha,12a alpha))-4-(dimethylamino)-1,4,4a,5,5a,6,11,12a- octahydro-3,5,10,12,12a-pentahydroxy-6-methylene- 1,11-dioxo-2-naphthacenecarboxamide, compd. with 2-amino-2-(hydroxymethyl)-1,3-propanediol (1:3)