4,5-Epoxy-3-hydroxyvaleric acid-beta-lactone 4247-30-7 5-19-04-00082 (Beilstein Handbook Reference) BRN 1305864 Pentanoic acid, 4,5-epoxy-3-hydroxy-, beta-lactone Valeric acid, 4,5-epoxy-3-hydroxy-, beta-lactone