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Catalog No.:A20066  
Product: Parecoxib impurity  
CAS No. 181696-35-5  
Chemical Name: 4-(5-methyl-3-phenylisoxazol-4-yl)benzenesulfonic acid  
Molecular Formula: C16H13NO4S  
Molecular Weight: 315.34  
Assay:95%  
Appearance:  
SMILES:CC1=C(C2=CC=C(S(=O)(O)=O)C=C2)C(C3=CC=CC=C3)=NO1  
Storage Condition:  
Remark: