The chemical Omeprazole has a designated molecular formula of C17H19N3O3S and a molecular weight of 345.417 g/mol. Synonyms may include: H 168/68, Antra, Audazol, Aulcer, Belmazol, CCRIS 7099, Ceprandal, Elgam, Emeproton, Gastrimut, HSDB 3575, Indurgan (ChemID). Omeprazole has been assigned a MeSH pharmacological action of: Proton Pump Inhibitor.