(9R,9'S)-4,4'-dihydroxy-10,10'-dioxo-5,5'-bis(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)-9,9',10,10'-tetrahydro-[9,9'-bianthracene]-2,2'-dicarboxylic acid;(-)-(9R,9'S)-5,5'-bis(beta-D-glucopyranosyloxy)-4,4'-dihydroxy-10,10'-dioxo-9,9',10,10'-tetrahydro-9,9'-bianthracene-2,2'-dicarboxylic acid;(9R)-9-[(9S)-2-carboxy-4-hydroxy-10-oxo-5-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydropyran-2-yl]oxy-9H-anthracen-9-yl]-4-hydroxy-10-oxo-5-[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydropyran-2-yl]oxy-9H-anthracene-2-carboxylic acid;(9R)-9-{(9S)-5-[(2S,4S,5S,3R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)(2H-3,4,5,6 -tetrahydropyran-2-yloxy)]-2-carboxy-4-hydroxy-10-oxo(9-9-hydroanthryl)}-5-[(2 S,4S,5S,3R,6R)-3,4,5-trihydroxy-6-(hydroxy;(9R,9'S)-4,4'-dihydroxy-10,10'-dioxo-5,5'-bis((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yloxy)-9,9',10,10'-tetrahydro-9,9'-bianthracene-2,2'-dicarboxylic acid;(9R,9'S)-5,5'-bis(beta-D-glucopyranosyloxy)-4,4'-dihydroxy-10,10'-dioxo-9,9',10,10'-tetrahydro-9,9'-bianthracene-2,2'-dicarboxylic acid