L-Glutamic acid, 5-[[1-[4-[(3-amino-2,3,6-trideoxy-.alpha.-L-lyxo-hexopyranosyl)oxy]-1,2,3,4,6,11-hexahydro-2,5,12-trihydroxy-7-methoxy-6,11-dioxo-2-naphthacenyl]ethylidene]-hydrazide, (2S-cis)-, polymer with N-[2-hydroxy-1,1-bis(hydroxymethyl)ethyl]-L-glutamine and 5-(phenylmethyl)hydrogen L-glutamate NSC301185