2,6-Nonadienal

Say it2,SIKS-non-uh-dye-EE-nal

Intense fresh cucumber peel and watermelon rind with a green violet-leaf note.

What it is: A molecule made in a lab.
Where it comes from: synthetic, natural in cucumber and violet leaves
When you smell it: Top notes: the first minutes.
What perfumers do with it: Parts-per-million doses give cucumber, melon and violet-leaf freshness to green and aquatic accords.
Worth knowing: Plants make it from linolenic acid the moment cucumbers, melons or leaves are cut.
Also called: Violet leaf aldehyde; cucumber aldehyde; (2E,6Z)-nona-2,6-dienal

Not on the label of any of the 232 perfumes read so far.

Sources