Benzoic acid, [1-[1,2,3,4,6,11-hexahydro-2,5,12-trihydroxy-7-methoxy-6,11-dioxo-4-[[2,3,6-trideoxy-3-(dimethylamino)-.alpha.-L-lyxo-hexopyranosyl]oxy]-2-naphthacenyl]ethylidene]hydrazide, monohydrochloride, (2S-cis)- NSC276749