(2s,3as,6as)-1-[(2s)-2-[[(2s)-1-ethoxy-1-oxo-4-(2,3,4,5,6-pentadeuteriophenyl)butan-2-yl]amino]propanoyl]-3,3a,4,5,6,6a-hexahydro-2h-cyclopenta[b]pyrrole-2-carboxylic Acid [ 1132661-86-9 ]