Sennoside A

Chemical Name: 4,4'-dihydroxy-10,10'-dioxo-5,5'-bis((3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)-9,9',10,10'-tetrahydro-[9,9'-bianthracene]-2,2'-dicarboxylic acid