CAS 6422-36-2 appears in our catalog under these names: (S)-2-((S)-Pyrrolidine-2-carboxamido)propanoic acid, 97%, 97%, H-Pro-Ala-OH, H–Pro–Ala–OH, H-Pro-Ala-OH 97%, H-Pro-Ala-OH, 99.95%. Offered by: Chemat, TRC, GLPBio, Ambeed, MedChemExpress. Available pack sizes: 100mg, 250mg, 500mg, 50mg, 1g, 5g, 100 mg, 50 mg.