Peppermint leaves.
Characteristic
The leaves of peppermint contain essential oil, which includes menthol and its ethers β-pinene, limonene, cineole, dipentene, pulegon and other terpenes. In addition, the leaves contain organic acids, tannins, flavonoids, carotene, betaine, hesperidin, microelements (copper, manganese, strontium, etc.) and other chemical compounds.