The chemical Captopril has a designated molecular formula of C9H15NO3S and a molecular weight of 217.283 g/mol. Synonyms may include: Acediur, Aceplus, Acepress, Acepril, Alopresin, Capoten, Captolane, L-Captopril, Captoprilum [INN-Latin], Captopryl, Captoril, Cesplon (ChemID). Captopril has been assigned a MeSH pharmacological action of: Enzyme Inhibitor.