Z-Leu-leu-leu-al

Z-Leu-leu-leu-al (N-benzoxycarbonyl-L-leucyl-L-leucyl-L-leucinal) is a tripeptide aldehyde compound primarily used as a research reagent in proteasome inhibition studies. Its structure features three leucine residues, an aldehyde group, and a benzyloxycarbonyl protecting group, contributing to its role as a laboratory tool for investigating protein degradation pathways.