Synthetics
Ethyl levulinate has an ethereal, fruity-green scent that is slightly waxy and reminiscent of melon.
Mosciano, Gerard P&F 15, No. 1, 19, (1990): Fruity, green, melon-like with waxy notes
Luebke, William tgsc, (1995): Sweet fruity floral berry green pineapple rhubarb
Indukern F&F: Fresh, fruity, apple