2-(2-oxotetrahydro-3-furanyl)ethyl acetate, .3-(2'-acetoxyethyl)-dihydro-2(3H)furanone, .3-(2-acetoxy-ethyl)-dihydro-furan-2-one, .3-(2-Acetoxy-aethyl)-dihydro-furan-2-on, .3-(2'-acetoxyethyl) dihydro-2(3H) furanone, .3-(2-acetoxy-ethyl)-4,5-dihydro-2(3H)-furanone