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Certified Reference Standards...
Chemical Name: 9-Oxo Ketotifen4,4'-sulfonyldiphenol
Synonym: Dapsone Impurity D
Smiles: O=[S](C1=CC=C(O)C=C1)(C2=CC=C(O)C=C2)=O
Inchi: InChI=1S/C12H8Cl2O2S/c13-9-1-5-11(6-2-9)17(15,16)12-7-3-10(14)4-8-12/h1-8H
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