CAS 63442-81-9 appears in our catalog under these names: L,L-Dityrosine, L,L-Dityrosine 99%, (2S,2'S)-3,3'-(6,6'-Dihydroxy-[1,1'-biphenyl]-3,3'-diyl)bis(2-aminopropanoic acid), 99%, 99%, L,L-Dityrosine, 99.80%. Offered by: TargetMol, Biosynth, Ambeed, Chemat, MedChemExpress. Available pack sizes: 1mg, 5mg, 10mg, 500ug, 25mg, 50mg, 100mg, 250mg.