Introduction:
Menthol, also known as menthol, is a terpene organic compound with the chemical formula C10H20O. Menthol is extracted from the leaves and stems of peppermint, and is a white crystal that is the main component of peppermint and peppermint essential oil. Menthol generally has two isomers (D-type and L-type), the natural menthol is mainly the levorotatory isomer (L-menthol), and the menthol here generally refers to the racemic menthol (DL-menthol).