1-Naphthacenecarboxylic acid, 4-((2,6-dideoxy-4-O-(2,6-dideoxy-alpha-L-lyxo-hexopyranosyl)-alpha-L-lyxo-hexopyranosyl)oxy)-2-ethyl-1,2,3,4,6,11-hexahydro-2,5,7-trihydroxy-6,11-dioxo-, methyl ester, (1R-(1alpha,2beta,4beta))- 79638-26-9