Synthetics
Amyl cinnamic aldehyde (aca) has a sweet, floral, and fruity aroma reminiscent of jasmine, with notes of apple, apricot, peach, and spice.
Mosciano, Gerard P&F 22, No. 6, 41, (1997): Sweet, floral, fruity, tropical and green with a powdery nuance
Luebke, William tgsc, (1981): Sweet floral oily fruity herbal jasmin
Pell Wall Perfumes: Soft-floral, fresh, jasmine, slight spice
Arctander has quite a bit to say about the material: “very mild oily-herbaceous and somewhat floral odor, reminiscent of many types of natural flowers, but mostly of jasmin, gardenia and tuberose. introduces jasmin-like floralness when accompanied by more volatile chemicals of floral character. blends excellently and assists in fixation of the fragrance (aca is quite tenacious) … aca is very susceptible to oxidation unless properly treated with an antioxidant (conventionally added by most manufacturers). old or oxidized aca has [an] objectionable, rancid-fatty odor. lower grades of aca may show by-odor of benzaldehyde, heptaldehyde or amyl nonenal, sometimes called di-heptenal.