Synthetics
2-dodecenal smells like a combination of citrus and soap, depending on individual perception.
Luebke, William tgsc, (1989): Green citrus fruity mandarin orange herbal
Alfrebro: Green, citrus, fruity
Bedoukian Research: Waxy, mandarin orange
Useful as a topnote to achieve a mandarine-orange, waxy effect.