CAS 81201-84-5 appears in our catalog under these names: L-Serine-13C, >95% (HPLC), L–Serine–1–13C, L-SERINE-1-13C, 99 ATOM % 13C, L-Serine-1-13C, L-Serine-1-13C, 98.0%. Offered by: TRC, GLPBio, Sigma-Aldrich, Chemat, MedChemExpress. Available pack sizes: 25mg, 50mg, 5mg, 10mg, 250MG, 10 mg, 5 mg.