Synthetics
(e,e)-2,4-undecadienal has no described odor.
Mosciano, Gerard P&F 15, No. 1, 19, (1990): Fatty, waxy, chicken with sweet nuances
Luebke, William tgsc, (1989): Oily caramellic spicy citrus buttery baked
Bedoukian Research: Buttery, baked-fruit, spicy character