Tonka bean. Soft and powdery-sweet, it smells a little bit caramelized, a gourmand note like vanilla, but with a grassy-herby undertone like mown hay or tobacco. Its scent is primarily made up of the molecule coumarin: the first synthesized molecule to be used in a major perfume. Coumarin was first synthesized in 1868 and debuted in Houbigant’s Fougère Royale in 1882. The molecule coumarin is also found in cassia, vanilla, sweet clover, strawberries, lavender, licorice, and apricots.