Geraniol is a straight-chain diterpenoid compound. It possesses a wide range of physiological activities, such as antiviral, antitumor, and antiseptic effects; it also has therapeutic effects on various diseases, including ulcers, neurasthenia, skin aging, thrombosis, atherosclerosis, and immunodeficiency. Geraniol, farnesol, geraniylgeraniol, geraniylcoumarin, and related compounds, including pentanol, are not only central compounds in biosynthetic intermediates, such as terpenes, carotenoids, and steroids, but also in pharmaceuticals, agrochemicals, and fragrances.