Ferrate(1-), .mu.-chlorohexachlorodi-, hydrogen, compd. with (8S-cis)-10-[(3-amino-2,3,6-trideoxy-.alpha.-L-lyxo-hexopyranosyl)oxy]-7,8,9,10-tetrahydro-6,8,11-trihydroxy-8-(hydroxyacetyl)-1-methoxy-5,12-naphthacenedione (1:1) NSC321536