CAS 5845-67-0 appears in our catalog under these names: Morphine tolerance peptide, 98%, Cyclo(Leu-Gly), >95% (HPLC), Cyclo(–Gly–Leu), Morphine Tolerance Peptide, (S)-3-Isobutylpiperazine-2,5-dione, 98%, 98%. Offered by: Combi-blocks, TRC, GLPBio, Biosynth, Chemat. Available pack sizes: 100mg, 1g, 250mg, 50mg, 25mg, 50 mg, 25 mg, 100 mg.