(R)-N-(1-Carboxyethyl-13C3)-D-norvaline 1-Ethyl Ester is the labeled analogue of (R)-N-(1-Carboxyethyl)-D-norvaline 1-Ethyl Ester (C178075), an intermediate in the synthesis of Perindoprilat (P287530), an angiotensin-converting enzyme (ACE) inhibitor. Antihypertensive.