Coumarin is derived from "coumarou", the French word for the tonka bean. Some scented sachets even have names like ""Heliotrope Sachet" and "Tonka Bean Sachet. Tonka bean oil is extracted from the seed of "Dipteryx odorata". The tonka bean ("D. odorata") is grown for its fragrant seeds. Reviewers particularly identified tonka bean, neroli and almond, along with woody and floral notes.