Peaches are deciduous trees of the Rosaceae family. They produce pale pink flowers with multiple petals from March to April. Their fruits, which grow from July to August, are also popular for eating. The fruit has a sweet, fruity, and rich scent. Although no fragrances are directly extracted from peaches, γ-Undecalactone, the main component of this sweet scent, is used in a variety of products, including flavors, perfumes, and toiletries. In addition to γ-Undecalactone, there are several fragrances classified as lactones, including γ-Nonalactone, which has a coconut-like scent, and γ-Decalactone, the main component of the sweet scent of osmanthus, all of which are familiar scents in our daily lives. In the world of perfume, the sweetness of this lactone is expressed as lactone-like or lactonic scent.