(9R,9'R)-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'R*)-5,5'-bis(beta-D-glucopyranosyloxy)-4,4'-dihydroxy-10,10'-dioxo-9,9',10,10'-tetrahydro-9,9'-bianthracene-2,2'-dicarboxylic acid;(9,9'-Bianthracene)-2,2'-dicarboxylic acid, 5,5'-bis(beta-D-glucopyranosyloxy)-9,9',10,10'-tetrahydro-4,4'-dihydroxy-10,10'-dioxo-, (R*,R*)- (VAN);(9R)-9-[(9R)-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'R*)-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'R)-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'R)-4,4'-dihydroxy-10,10'-dioxo-5,5'-bis({[(2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy})-9H,9'H,10H,10'H-[9,9'-bianthracene]-2,2'-dicarboxylic acid;(9R,9'R)-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'R)-5,5'-Bis(beta-D-glucopyranosyloxy)-9,9',10,10'-tetrahydro-4,4'-dihydroxy-10,10'-dioxo- [9,9'-bianthracene]-2,2'-dicarboxylic acid;(R*,R*)-5,5'-Bis(beta-D-glucopyranosyloxy)-9,9',10,10'-tetrahydro-4,4'-dihydroxy-10,10'-dioxo-[9,9'-bianthracene]-2,2'-dicarboxylic acid