CAS 2507-61-1 appears in our catalog under these names: (2S,4R)-4-Fluoropyrrolidine-2-carboxylic acid, 98%, H–trans–4–Fluoro–Pro–OH, (2S,4R)-4-Fluoro-pyrrolidine-2-carboxylic acid, trans-4-Fluoro-L-proline, >98.0%(HPLC), H-trans-4-F-L-Pro-OH 97%. Offered by: Combi-blocks, GLPBio, Biosynth, TCI, Ambeed. Available pack sizes: 100mg, 1g, 5g, 250mg, 10g, 25g, 2g, 50mg.