The present invention relates to a process for the preparation of the ACEinhibitor (2S,3aS,7aS)-l-((2S)-2-(((1S)-l-(ethoxycarbonyl)butyl)amino)-l-oxopropyl)octahydro-lH-indol-2-carboxylic acid and of pharmaceuticallyacceptable salts thereof as well as to intermediates useful in said process.