Synthetics
2-methyl-2-pentenal has a complex aroma reminiscent of onions, chives, and a variety of fruits, including cranberries, guavas, grapes, plums, as well as notes of mustard, cognac, black tea, coffee, roasted peanuts, walnuts, and other food items.
Mosciano, Gerard P&F 18, No. 1, 43, (1993): Pungent, fruity with a juicy ripe aldehydic nuance
Luebke, William tgsc, (2021): Aldehydic green cortex fruity alliaceous ripe cherry earthy
Taytonn ASCC: Aldehydic/ aldehyde, grass, green
FCI SAS: Poweful green gassy and diffusive odor, somewhat fruity
Kingchem Laboratories: Powerful green grassy and diffusive odor, slightly fruity