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Pogostemon cablin (Blanco) Benth Made from dried leaves. It is a viscous liquid ranging from reddish brown to greenish brown, with a unique, slightly camphor like woody fragrance.The patchouli shrub is mainly planted in Indonesia. It grows up to 1 meter, but when harvested, it will be cut to 10-15 centimeters. It is best to extract oil from sun dried leaves, with a yield of about 2%.The three terpenoids found in patchouli oil, namely caryophyllene, patchouli alcohol or patchouli alcohol, and nopachenol, are the typical sources of patchouli fragrance. Thin layer chromatography and high performance liquid chromatography are used to identify potential chemical markers for evaluating the quality of the Chinese herbal medicine ingredient ??patchouli herb?? (aboveground part of patchouli). In addition to the reported patchouli alcohol and 2-hydroxy-6-methyl-3- (4-methylpentanoyl) -4-pyranone, three phenylethane compounds (acteoside, isoacteoside, and crenatoside) were also isolated from this plant material for the first time.

Menthol, also known as hexahydrothymol, is commonly known as L-menthol, and its scientific name is 5-methyl-2-isopropyl-cyclohexanol. It is a very important cycloterpene alcohol. L-menthol has a characteristic mint aroma and has a cooling effect. Racemic ?C menthol also has a cooling effect, while other isomers have no cooling effect. L-menthol accounts for a large proportion of applications in medicine and health. It can be used as poultice, ointment, analgesic, local anesthetic, cooling agent, antipruritic agent, mouthwash, bactericide, and for the treatment of toothache, Tablets for stomach pain, neuralgia, etc.; the second largest use is spices. L-menthol is a spice in demand among cyclic monoterpene alcohols. It can be used as tobacco spices, used with peppermint oil to prepare toothpaste flavors, and other spices. Toilet water; menthol can also be used as a flavoring agent for a variety of foods, such as candies, chewing gum, cakes, fruit wine, refreshing drinks, etc.