CAS 6089-04-9 appears in our catalog under these names: TETRAHYDRO-2-(2-PROPYNYLOXY)-2H-PYRAN, 9, 2–(2–Propynyloxy)tetrahydropyran, 2-(2-Propynyloxy)tetrahydropyran, >97.0%(GC), 2-(2-Propynyloxy)tetrahydro-2H-pyran, 98%, 2-(2-Propynyloxy)tetrahydropyran 97%. Offered by: Sigma-Aldrich, GLPBio, TCI, Thermo Scientific (Acros), Ambeed. Available pack sizes: 25G, 100g, 5g, 1g, 10g, 50g, 500g, 5 g.