5,12-Naphthacenedione, 7,8,9,10-tetrahydro-6,8,11-trihydroxy-8-(hydroxyacetyl)-1-methoxy-10-[[2,3,6-trideoxy-3-(trimethylammonio)-.alpha.-L-lyxo-hexopyranosyl]oxy]-, chloride, (8S-cis)- NSC249335