4.4-bis(2-disulfonic acid styryl) biphenyl;Fluorescent brightener CBS-X;C.I. Fluorescent Brightener 351;2,2'-([1,1'-Biphenyl]-4,4'-diyldi-2,1-ethenediyl)bis-benzenesulfonic acid;4,4'-Bis[2-(2-sulfophenyl)ethenyl]biphenyl;
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