CAS 67644-00-2 appears in our catalog under these names: (S)-2-((S)-Pyrrolidine-2-carboxamido)pentanedioic acid, H-Pro-Glu-Oh, >95% (HPLC), H–Pro–Glu–OH, H-Pro-Glu-OH, H-Pro-Glu-OH 98%. Offered by: Chemat, TRC, GLPBio, Biosynth, Ambeed. Available pack sizes: 100mg, 500mg, 50mg, 1g, 5g, 1000mg, 2000mg, 5000mg.