L-Menthol 98%
synonyms: Menthol、Pepermint camphor
Herb source: Menthol haplocalyx Bing
Structural formula:
Molecular Formula: C10H20O,
Molecular Weight: 156.27
CAS Number: 2216-51-5
Physics Properties:white crystal
Pharmacology function: Antipruritic,anti- Pain, Anticorrosion , Anesthesia , Cool, Anti-inflammatory , Treating Headache ,




Levodopa 99%

Chemical Name L-Dopa, Levodopa, L-Tyrosine, 3-hydroxy-
M.F. & M.W.: C9H11NO4;197.19
CAS NO. 59-92-7
Physical properties Colorless to white, smellless and tasteless crystal or crystalline powder, acicular crystal (water). Melting point , 276-278°C,284-286°C,α13D-13.1°C (C=5.12,1N hydrochloric acid).
It dissolves easily in diluted hydrochloric acid and formic acid, soluble in water (65mg/44ml), and almost insoluble in ethanol, benzene, chloroform, and ethyl acetate.
Botanical source Seeds of Vicia faba L and Mucuna cochin-chinensis
(Lour)A.Cheval., seeds of M.sempervirens Hemsl (S.capiatumn Kuntze), seeds of M.birdwoodiana Tuteh, and seeds of Stizolobium caprtatum (Sweet) O.Kuntze.
Specification L-Dopa＞99%, HPLC ,complied with BP2002 standard.
Functions and Applications This product is one of the precursors during the In vivo synthesis of noradrenalin, dopamine, and so on. It can increase the level of dopamine in cerebral tissue. Parkinsonism is caused by the lack of dopamine in cerebral tissue, so this product can be used in the clinical treatment of parkinsonism.
It can alleviate the symptom (outsourced dopamine cannot pass Blood-Brain Barrier, so it cannot be used directly). It is also effective upon similar symptoms caused by manganese and cobalt toxicosis. It has certain curative effect on liver stupor caused by acute liver failure.