4',4'-Dichloromercuric-2,2,2',2'-bistilbene tetrasulfonic acid 94613-70-4 DCMBT Mercurate(4-), dichloro(mu-((3,3'-disulfonato(1,1'-biphenyl)-4,4'-diyl)bis(2,1-ethenediyl(3-sulfonato-4,1-phenylene))))di-, (2S-(2alpha,5alpha,6beta(S*)))-