Synthetics
Coumarin smells sweet and aromatic with hints of coconut, hay, and tobacco, making it a versatile base note in perfumery.
Luebke, William tgsc, (1982): Sweet hay tonka new mown hay
Fraterworks: Switching between hay and tonka beans depending on the context of the material in a fragrance, coumarin is one of the most widely used and popular synthetic aroma chemicals. it was the first synthetic used in a fragrance — 10% of fougère royale by paul parquet for houbigant in 1882 (see the formula for this fine fragrance below).
A touch of coumarin can naturalise vanillin giving a truer note of vanilla beans, while an overdose contributes a wonderful cut hay scent.
Pell Wall Perfumes: Sweet, hay, tonka, new-mown-hay
Arctander describes it as “sweet, herbaceous-warm, somewhat spicy odor, in extreme dilution more haylike, nut- iike, tobacco-like… extensively used in perfumery to support herbaccous odors, lavender, lavandin, rosemary, citrus oils, oakmoss, etc., and as a fixative in numerous types of fragrances; almost a standard ingredient in fougère types with amylsalicylate and lavender-notes, with or without oakmoss.”