56-17-7

white powder

hepatoprotectant, t-glutaminase inhibitor, heat shock protein promoter, caspase inhibitor

sulfhydryl modifying reagent and heparin antagonist

room temperature (desiccate)

Recrystallise the salt by dissolving in EtOH containing a few drops of dry EtOH/HCl, filtering and adding dry Et2O. The solid is dried in a vacuum and stored in a dry and dark atmosphere. It has been recrystallised from EtOH (solubility: 1g in 60mL of boiling EtOH) or MeOH (plates). The free base has b 90-Purification of Biochemicals — Amino Acids and Peptides 100o/0.001mm, 106-108o/5mm and 135-136o/760mm, d 4 1.1559, n D 1.5720. [Verly & Koch Biochem J 58 663 1954, Gonick et al. J Am Chem Soc 76 4671 1954, Jackson & Block J Biol Chem 113 137 1936.] The dihydrobromide has m 238-239o (from EtOH/Et2O) [Viscontini Helv Chim Acta 36 835 1953]. [Beilstein 4 H 287, 4 IV 1578.]