CAS 112898-23-4 appears in our catalog under these names: Boc-pen(me)-oh dcha, 95%, Dicyclohexylamine (R)-2-((tert-butoxycarbonyl)amino)-3-methyl-3-(methylthio)butanoate, 98%, 98%, Dicyclohexylamine (R)-2-((tert-butoxycarbonyl)amino)-3-methyl-3-(methylthio)butanoate, 98%, Boc-Pen(Me)-OH·DCHA, 95%. Offered by: Combi-blocks, Chemat, Fluorochem, Ambeed. Available pack sizes: 250mg, 5g, 1g.