1,4-Bis[3-[2-[(chloroacetyl)aminomethyl]-4-sodiosulfophenyl]-1-methylpropylamino]anthraquinone;4,4'-[(9,10-Dihydro-9,10-dioxo-1,4-anthracenediyl)bis[imino(3-methyl-3,1-propanediyl)]]bis[3-[[(chloroacetyl)amino]methyl]benzenesulfonic acid sodium] salt