4-(2,4-Dihydroxy-1-anthraquinonylamino)benzenesulfonic acid 73698-38-1 Benzenesulfonic acid, 4-(2,4-dihydroxy-1-anthraquinonylamino)- C.I. 63615 CERN moridlova 13 [Czech] Cern Mo rava alizarinova B [Czech]