(4S-(4 alpha,4a alpha,5a alpha,6 beta,12a alpha))-N-(bis(2-chloroethylamino)(4-hydroxyphenyl)methyl)-4-(dimethylamino)-1,4,4a,5,5a,6,11,12a-octahydro-3,6,10,12,12a-pentahydroxy-6-methyl-1,11-dioxo-2-naphthacenecarboxamide