Trandolapril is a heterobicylic compound that is (2S,3aR,7aS)-1-[(2S)-2-aminopropanoyl]octahydro-1H-indole-2-carboxylic acid in which the hydrogen of the amino group is substituted by a (2R)-1-ethoxy-1-oxo-4-phenylbutan-2-yl group. It is a angiotensin-converting enzyme inhibitor and a prodrug used for the treatment of hypertension. It has a role as an EC 3.4.15.1 (peptidyl-dipeptidase A) inhibitor, an antihypertensive agent and a prodrug. It is a tertiary carboxamide, an ethyl ester, an organic heterobicyclic compound, a dicarboxylic acid monoester, a dipeptide and a secondary amino compound. It is functionally related to a trandolaprilat.