Synonyms: [9,9'-Bianthracene]-2,2'-dicarboxylicacid, 5,5'-bis(β-D-glucopyranosyloxy)-9,9',10,10'-tetrahydro-4,4'-dihydroxy-10,10'-dioxo-,calcium salt (1:1), (R*,R*)-;Pursennid;Pursennide;[9,9'-Bianthracene]-2,2'-dicarboxylicacid, 5,5'-bis(β-D-glucopyranosyloxy)-9,9',10,10'-tetrahydro-4,4'-dihydroxy-10,10'-dioxo-,calcium salt (1:1), (9R,9'R)-rel-;