1-Naphthacenecarboxylic-acid, 4-(((2''',3''-anhydro)-O-3,6-dideoxy-alpha-L-erythro-hexopyranos-4-ulosyl-(1-4)-O-2,6-dideoxy-alpha-L-lyxo-hexopyranosyl-(1-4)-2,3,6-trideoxy-3-(dimethylamino)-alpha-L-lyxo-hexopyranosyl)oxy)-2-ethyl-1,2,3