CAS NO. 53226-73-6 | (3S,4S)-4-[[[(3S,4S)-4-[[N-(1-Oxoheptyl)-L-Val-L-Val-]amino]-3-hydroxy-6-methylheptanoyl]-L-Ala-]amino]-3-hydroxy-6-methylheptanoic acid |

(3S,4S)-4-[[[(3S,4S)-4-[[N-(1-Oxoheptyl)-L-Val-L-Val-]amino]-3-hydroxy-6-methylheptanoyl]-L-Ala-]amino]-3-hydroxy-6-methylheptanoic acid

Pepstatin D	1-[N-(1-Oxoheptyl)-L-valyl]pepstatin A
(3S,4S)-4-[[[(3S,4S)-4-[[N-(1-Oxoheptyl)-L-Val-L-Val-]amino]-3-hydroxy-6-methylheptanoyl]-L-Ala-]amino]-3-hydroxy-6-methylheptanoic acid