L-Glutamic acid, 5-methyl ester, polymer with (8S-cis)-8-acetyl-10-[(3-amino-2,3,6-trideoxy-.alpha.-L-lyxo-hexopyranosyl)oxy]-7,8,9,10-tetrahydro-6,8,11-trihydroxy-1-methoxy-5,12-naphthacenedione and N-[2-hydroxy-1,1-bis(hydroxymethyl)ethyl]-L-glutamine NSC301184