CAS 2172820-12-9 appears in our catalog under these names: (S,RS)–AHPC–PEG4–acid, (S,R,S)-AHPC-PEG4-acid 95%, (S,R,S)-AHPC-CO-PEG4-C2-ACID, (S,R.S)-AHPC-PEG4-Acid, 95%, 95%, (S,R,S)-AHPC-PEG4-acid, 98.26%. Offered by: GLPBio, Ambeed, Sigma-Aldrich, Chemat, MedChemExpress. Available pack sizes: 100mg, 250mg, 50mg, 1g, 25 mg, 100 mg, 10 mg, 50 mg.