Synthetics
(e)-2-dodecenal smells like a combination of citrus peel, ginger, carrots, milk, roast peanuts, roast beef, and cured pork.
Luebke, William tgsc, (1986): Citrus metallic mandarin orange waxy aldehydic
Moellhausen: Strongly fatty, on dilution somewhat citrusy, mandarin, orange-like