The chemical Nimesulide has a designated molecular formula of C13H12N2O5S and a molecular weight of 308.308 g/mol. Synonyms may include: R-805, Aulin, BRN 2421175, EINECS 257-431-4, Flogovital, Mesulid, Nimed, Nimesulida [INN-Spanish], Nimesulidum [INN-Latin], 4-Nitro-2-phenoxy-methanesulfonanilide, N-(4-Nitro-2-phenoxyphenyl)methanesulfonamide, Sulidene (ChemID). Nimesulide has been assigned a MeSH pharmacological action of: Cyclooxygenase Inhibitor.