(2~{S})-1-[(2~{S})-2-[[(1~{S})-1-[(2~{S})-1-[(2~{S})-2-azanyl-4-oxidanyl-4-oxidanylidene-butanoyl]pyrrolidin-2-yl]-2-oxidanyl-2-oxidanylidene-ethyl]amino]propanoyl]pyrrolidine-2-carboxylic acid

P12821 — Angiotensin-converting enzyme