2(3H)-FURANONE, DIHYDRO-3-ETHYL-3-PHENYL- 4-17-00-05003 (Beilstein Handbook Reference) 4064-16-8 5-Etylo-5-fenylo-beta-butyrolakton [Polish] BEFL BRN 0144400 alpha-Ethyl-alpha-phenyl-gamma-butyrolactone