oxan-2-one tetrahydropyran-2-one 2-tetrahydropyranone 26354-94-9 542-28-9 94585_FLUKA NSC65442 5-Valerolactone InChI=1/C5H8O2/c6-5-3-1-2-4-7-5/h1-4H 389579_ALDRICH Tetrahydro-2H-2-pyranone C02240 Poly-delta-valerolactone delta-Valerolactone AI3-25024 EINECS 208-807-1 NSC 6247 Penta-1,5-lactone Pentanoic acid, 5-hydroxy-, delta-lactone TETRAHYDRO-2H-PYRAN-2-ONE Valeric acid, delta-hydroxy-, delta-lactone delta-Valeryllactone Poly-.delta.-valerolactone .delta.-Valerolactone .delta.-Valeryllactone .gamma.-Valerolactone 2H-Pyran-2-one, tetrahydro- NSC6247 Pentanoic acid, 5-hydroxy-, .delta.-lactone Tetrahydro-2-pyranone Valeric acid, .delta.-hydroxy-, .delta.-lactone WLN: T6OVTJ CHEBI:16545