(9,9'-Bianthracene)-2,2'-dicarboxylic acid, 9,9',10,10'-tetrahydro-4,4',5,5'-tetrahydroxy-10,10'-dioxo-, (R*,S*)- (R*,S*)-9,9',10,10'-Tetrahydro-4,4',5,5'-tetrahydroxy-10,10'-dioxo(9,9'-bianthracene)-2,2'-dicarboxylic acid 517-44-2 EINECS 208-239-4 NSC 658576 Sennidin B