2(3H)-FURANONE, 5-METHYL- 3-Pentenoic acid, 4-hydroxy-, gamma-lactone 4-Hydroxy-3-pentenoic acid gamma-lactone 4-Hydroxypent-3-enoic acid lactone 5-17-09-00120 (Beilstein Handbook Reference) 5-Methyl-2(3H)-furanone 5-Methylfuran-2(3H)-one 591-12-8 AI3-04326 BRN 0108394 CCRIS 3594 EINECS 209-701-8 FEMA No. 3293 NSC 654 alpha(beta,gamma or delta2)-Angelica lactone alpha-Angelica lactone alpha-Angelicalactone delta(2)-Angelica lactone delta(sup 2)-Angelica lactone gamma-Methyl-beta,gamma-crotonolactone