2,6-Epoxy-2H-naphthaceno(1,2-b)oxocin-14-carboxylic acid, 5-0(O-2,6-dideoxy-alpha-L-lyxo-hexopyranosyl-(1->4)-O-2,3,6-trideoxy-3-C-methyl-3-nitro-beta-L-ribo-hexopyranosyl-(1->4)-2,6-dideoxy-alpha-L-lyxo-hexopyranosyl)oxy-4-dimethylami