CAS 2438-57-5 appears in our catalog under these names: H–cis–4–Fluoro–Pro–OH, H-cis-4-F-Pro-OH 97%, (2S,4S)-4-Fluoropyrrolidine-2-carboxylic Acid, 97%, 97%, (2S,4S)-4-Fluoropyrrolidine-2-carboxylic acid, 95%. Offered by: GLPBio, Ambeed, Chemat, Fluorochem. Available pack sizes: 5g, 1g, 250mg, 100mg, 10g.