CAS 66438-39-9 appears in our catalog under these names: Boc-lys(2-chloro-z)-osu, 95%, (S)-2,5-Dioxopyrrolidin-1-yl 2-((tert-butoxycarbonyl)amino)-6-((((2-chlorobenzyl)oxy)carbonyl)amino)hexanoate, 95+%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 1g, 25g, 5g.