2(5H)-FURANONE, 5-METHYL- 2-Pentanoic acid, 4-hydroxy-, gamma-lactone (6CI,7CI) 2-Penten-4-olide 2-Pentenoic acid, 4-hydroxy-, gamma-lactone 4-Hydroxy-2-pentenoic acid gamma-lactone 5-17-09-00121 (Beilstein Handbook Reference) 5-Methyl-2(5H)-furanone 5-Methylfuran-2(5H)-one 591-11-7 AI3-61052 BRN 0108058 EINECS 209-700-2 NSC 655 alpha,beta-Angelica lactone delta(sup 1)-Angelica lactone delta(sup1)-Angelica lactone delta1-Angelica lactone gamma-Methyl-alpha,beta-crotonolactone