1,4-Heptanolide 105-21-5 1336-71-6 2(3H)-Furanone, dihydro-5-propyl- 4-Hydroxyheptanoic acid lactone 4-Hydroxyheptanoic acid, gamma-lactone 4-Propyl-4-hydroxybutanoic acid lactone 5-17-09-00057 (Beilstein Handbook Reference) 5-PROPYLDIHYDRO-2-FURANONE 57129-71-2 BRN 0109569 Dihydro-5-propyl-2(3H)-furanone EINECS 203-279-9 FEMA No. 2539 Heptan-4-olide Heptanolide-4,1 NSC 46097 gamma-Heptalactone gamma-Heptalactone (natural) gamma-Heptanolactone gamma-Propiobutyrolactone gamma-Propyl-gamma-butyrolactone