The chemical Orlistat has a designated molecular formula of C29H53NO5 and a molecular weight of 495.745 g/mol. Synonyms may include: Orlipastat, Orlipastatum [INN-Latin], (-)-Tetrahydrolipstatin, Ro 18-0647/002, Tetrahydrolipstatin, Xenical, Alli, Orlipastatum, UNII-95M8R751W8, HSDB 7556 (ChemID). Orlistat has been assigned a MeSH pharmacological action of: Enzyme Inhibitor.