CAS 644981-35-1 appears in our catalog under these names: Val–Cit–PAB–MMAE, Val-Cit-PAB-MMAE/ 99.66% (existing batch purity), Val-Cit-PAB-MMAE, Val-Cit-PAB-MMAE 99%, Val-Cit-PAB-MMAE, 98%, 98%. Offered by: GLPBio, TargetMol, Biosynth, Ambeed, Chemat. Available pack sizes: 1mg, 5mg, 10mg, 100mg, 50mg, 2mg, 25mg, 5g.