(9,9'-Bianthracene)-2-carboxylic acid, 5,5'-bis(beta-D-glucopyranosyloxy)-9,9',10,10'-tetrahydro-4,4'-dihydroxy-2'-(hydroxymethyl)-10,10'-dioxo-, (R*,R*)- 26403-11-2 28878-51-5 37271-16-2 Sennoside C Sennoside D