CAS No 178603-73-1 , (4S)-4-[[(2S)-2-[5-[(3aS,4S,6aR)-2-oxo-1,3,3a,4,6,6a-hexahydrothieno[3,
4-d]imidazol-4-yl]pentanoylamino]-3-carboxypropanoyl]amino]-5-[[(2S)-1-[
[(2S)-1-carboxy-3-oxopropan-2-yl]amino]-3-methyl-1-oxobutan-2-yl]amino]-
5-oxopentanoic acid