Synthetics
Furfuryl valerate has a sweet, fruity, and slightly floral aroma with a hint of caramel.
Mosciano, Gerard P&F 16, No. 2, 49, (1991): Sweet, overripe fruity, pineapple and apple with caramellic nuances
Luebke, William tgsc, (1997): Sweet fruity pineapple apple tropical cheesy
Alfrebro: Sweet, ester, ripe, pineapple, fruity