Synonyms: (2S,3aS,7aS)-1-[(2S)-2-[[(1S)-1-Carboxybutyl]amino]-1-oxopropyl-13C3]octahydro-1H-indole-2-carboxylic Acid; [2S-[1[R*(R*)],2α,3aβ,7aβ]]-1-[2-[(1-Carboxybutyl)amino]-1-oxopropyl-13C3]octahydro-1H-indole-2-carboxylic Acid; S 9780-13C3; Perindopril Related Compound B USP-13C3