4H-Anthra(1,2-b)pyran-4,7,12-trione, 2-(2,3-dimethyloxiranyl)-5,11-dihydroxy-10-02,3,6-trideoxy-4-O-(2,6-dideoxy-3-O-methyl-alpha-D-ribo-hexopyranosyl)-3-C-methyl-3-(methylamino)-alpha-L-lyxo-hexopyranosyl-