1-Naphthacenecarboxylic acid, 4-((O-2,6-dideoxy-alpha-L-lyxo-hexopyranosyl-(1-4)-O-2,6-dideoxy-alpha-L-lyxo-hexopyranosyl-(1-4)-2,3,6-trideoxy-3-(methylamino)-alpha-L-lyxo-hexopyranosyl)oxy)-2-ethyl-1,2,3,4,6,11-hexahydro-2,5,7,10-tetrahydroxy-6,11-dioxo-, methyl ester, (1R-(1alpha,2beta,4beta))