Synthetics
(e,e)-2,4-hexadienal has no known odor.
Mosciano, Gerard P&F 18, No. 3, 53, (1993): Green, fruity, aldehydic, citrus and waxy
Luebke, William tgsc, (1989): Sweet green spicy floral citrus
Kingchem Laboratories: Very diffusive green odor, slightly pungent and fatty
FCI SAS: Very diffusive green odor, slightly pungent, slightly fatty
Bedoukian Research: Fatty, sweet, green aldehydic odor with a spicy finish