1-Naphthacenecarboxylic acid, 2-ethyl-1,2,3,4,6,11-hexahydro-2,5,7,12-tetrahydroxy-6,11-dioxo-4-((2,3,6-trideoxy-3-(dimethylamino)-4-O-((2S-(2alpha,5beta(2S*,6R*),6beta))-tetrahydro-6-methyl-5-((tetrahydro-6-methyl-5-oxo-2H-pyran-2-yl)oxy)-2H-pyran-)))