1-Naphthacenecarboxylic acid, 2-ethyl-1,2,3,4,6,11-hexahydro-2,5-dihydroxy-7-methoxy-6,11-dioxo-4-((2,3,6-trideoxy-4-O-(2,6-dideoxy-4-O-((2R-trans)-tetrahydro-6-methyl-5-oxo-2H-pyran-2-yl)-alpha-L-lyxo-hexopyranosyl)-3-(dimethylamino)-alpha-L-lyxo-hexopyranosyl)oxy)-, methyl ester, (1R-(1alpha,2beta,4beta))-