1-Naphthacenecarboxylic acid, 2-ethyl-1,2,3,4,6,11-hexahydro-2,5,7-trihydroxy-6,11-dioxo-4-((2,3,6-trideoxy-3-(dimethylamino)-alpha-L-lyxo-hexapyranosyl)oxy)-, methyl ester,(1R-(1-alpha,2-beta,4-beta))-