CAS 87304-15-2 appears in our catalog under these names: (S)-2-((2S,3R)-3-((tert-Butoxycarbonyl)amino)-2-hydroxy-4-phenylbutanamido)-4-methylpentanoic acid, 97%, E3 ligase Ligand 9, 97%, 97%, E3 ligase Ligand 9. Offered by: Fluorochem, Chemat, MedChemExpress. Available pack sizes: 100mg, 250mg, 1g, 5g, 50mg, 1 g.