CAS 33173-31-8 appears in our catalog under these names: (S)-2-Acetoxy-3-phenylpropanoic acid, 95%, (S)–2–Acetoxy–3–phenylpropanoic acid, (S)-2-Acetoxy-3-phenylpropanoic acid 97%, (S)-2-Acetoxy-3-phenylpropanoic acid, 97%, 97%, (S)-2-Acetoxy-3-phenylpropanoic acid, 97%. Offered by: Combi-blocks, GLPBio, Ambeed, Chemat, Fluorochem. Available pack sizes: 1g, 250mg, 5g, 100mg.