It’s a biologically active metabolite of nimesulide. Nimesulide is a nonsteroidal anti-inflammatory drug (NSAID) used to treat pain and inflammatory diseases. NSAIDs work by inhibiting the activity of cyclooxygenase enzymes involved in the synthesis of key biological mediators, namely prostaglandins and thromboxanes. 

Catalog number: C0178
CAS number: 109032-22-6
Molecular weight: 324,31(1)
Molecular formula: C13H12N2O6S
Purity: > 98% HPLC