CAS 997-20-6 appears in our catalog under these names: H–Lys–Lys–Lys–Lys–OH, H-Lys-Lys-Lys-Lys-OH acetate salt, Tetralysine 95% TFA, Tetralysine. Offered by: GLPBio, Biosynth, Ambeed, MedChemExpress. Available pack sizes: 250mg, 50mg, 100mg, 500mg, 1g, 5 mg, 10 mg.