N-[(R)-1-Carbethoxybutyl]-(S)-alanine Benzyl Ester is an intermediate for the synthesis of N-[(R)-1-Carbethoxybutyl]-(S)-alanine (C178000),which is an intermediate in the synthesis of Perindoprilat (P287530), an angiotensin-converting enzyme (ACE) inhibitor. Antihypertensive.