Farnesene

Farnesene is a sesquiterpene. Labs also print alpha-farnesene and beta-farnesene. The smell is green apple skin, with a light woody note behind it. The name sits with farnesol, from the old botanical name of the sweet acacia used in perfume work.

Alpha-farnesene is the compound in the wax of apple and pear skins. It rises as the fruit ripens, which is why the word shows up in fruit-storage research as well as in fragrance. Aphids also release farnesene as an alarm scent. Ginger and chamomile carry related farnesene notes.

On a cannabis panel it is usually a small line, often beside myrcene or caryophyllene. Nerolidol is the closer sesquiterpene neighbor: softer, more floral, a different molecule. A farnesene line describes that apple-skin note. It does not sort the cut into a family.