The molecule is a tripeptide derived from methoxysuccinyl-Ala-Ala-Pro-Val by conversion of the terminal carboxy group to the corresponding chloromethyl ketone. It has a role as an EC 3.4.21.37 (leukocyte elastase) inhibitor. It is an alpha-chloroketone, a tripeptide and a methyl ester. It derives from a succinic acid.
methyl 4-[[(2S)-1-[[(2S)-1-[(2S)-2-[[(3S)-1-chloro-4-methyl-2-oxopentan-3-yl]carbamoyl]pyrrolidin-1-yl]-1-oxopropan-2-yl]amino]-1-oxopropan-2-yl]amino]-4-oxobutanoate