Calpain and cathepsin inhibitor. Cell-permeable, ethyl ester of E-64-c. The ester is hydrolyzed by intracellular esterases to produce E-64-c. Inhibits calpain and cathepsins B, H, and L. Inhibits degradation of autophagic cargo inside autophagolysosomes. Alternative Name: 2S,3S-trans-(Ethoxycarbonyloxirane-2-carbonyl)-L-leucine-(3-methylbutyl) amide. Aloxistatin. Formula: C17H30N2O5. MW: 342.4. CAS Number: 88321-09-9. Purity: ≥98% (HPLC). Appearance: White solid. Solubility: Soluble in 100% ethanol (>10mg/ml) or DMSO (20mg/ml). Use/Stability: Store, as supplied, at -20°C for up to 1 year. Store solutions at -20°C for up to 2 months. Long Term Storage: -20°C