The chemical Z-Leu-Tyr-chloromethylketone has a known molecular formula of C24-H29-Cl-N2-O5. Synonyms may include: Carbobenzyloxyleucyl-tyrosine chloromethyl ketone, Carbobenzyloxy-leucine-tyrosine chloromethylketone, Cbz-leu-tyr-cmk, (S-(R*,R*))-Phenylmethyl (1-(((3-chloro-1-((4-hydroxyphenyl)methyl)-2-oxopropyl)amino)carbonyl)-3-methylbutyl)carbonate, ZLYCK (ChemID).