Synonyms: delta-Valerolactone;5-Valerolactone;2H-Pyran-2-one, tetrahydro-;.delta.-Valerolactone;542-28-9;Tetrahydro-2-pyranone;TETRAHYDRO-2H-PYRAN-2-ONE;CHEBI:16545;Tetrahydro-2H-2-pyranone;26354-94-9;|A-valerolactone;oxan-2-one;delta-Valeryllactone;Penta-1,5-lactone;.delta.-Valeryllactone;tetrahydro-pyran-2-one;Poly-delta-valerolactone;AC1L1WAZ;AC1Q6HRT;WLN: T6OVTJ;Poly-.delta.-valerolactone;Valeric acid, .delta.-lactone;389579_ALDRICH;CHEMBL452383;94585_FLUKA;Pentanoic acid, .delta.-lactone;NSC6247;NSC 6247;NSC-6247;NSC65442;EINECS 208-807-1;NSC-65442;SBB060349;ZINC06661193;Pentanoic acid, 5-hydroxy-, delta-lactone;AI3-25024;FT-0084698;V0039;Valeric acid, delta-hydroxy-, delta-lactone;C02240;I14-7902;InChI=1/C5H8O2/c6-5-3-1-2-4-7-5/h1-4H