Crude drug sample data base

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Crude drug name

Market name杜仲
Formal name杜仲
Japanese nameとちゅう, Tochū
Vernacular nameDuzhong
Latin nameEucommiae Cortex (JP), (CP)
English nameEucommia Bark (JP), (CP)
Original plant nameEucommia ulmoides Oliv., (Tochū)
Family nameEucommiaceae
Used partClassificationPlant origin
Sub classification bark
Collection informationPeople's Republic of China, Ziyuan, Ziyunxin Pharmaceutical Co.
Collection date1986/06/14
CollectorKatsuko Komatsu
TMPW No.6572

The capital city, provincial capital city or the representative　　
location of its administrative area is indicated.　　
Production area information
https://ethmed.toyama-wakan.net/img/pin_san.png
26.042443
110.65269999999998
Collection information
People's Republic of China,Ziyuan
https://ethmed.toyama-wakan.net/img/pin_nyu.png

Scientific information data base

Common name杜仲, Duzhong, Eucommiae Cortex (JP18, CP2020), Eucommia Bark (JP18, CP2020)
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Original plant nameEucommia ulmoides Oliver , (Tochū)
original plant image
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Family nameEucommiaceae
Used partbark
Quality for selectionGood Duzhong has thick and moist bark. It produces lots of silver filiform threads when it is folded crosswise and stretched. (TN)
Official compendiumJP XVIII, CP (2020 ed.)
Clinical applicationAs a tonic, painkiller and antihypertensive, Duzhong is applied for deficiency of the kidney, pain of knee and low back, back problem of pregnant women, weakness of legs, threatened abortion and hypertention.
Medical systemTraditional Chinese medicine
Drug effect in
traditional medicine		Traditional
classification		Replenishing Yang(vital function) drugs
Beneficial effect[Property and Flavor] Warm; sweet.
[Meridian Tropism] Liver and kidney meridians.
[Actions] To tonify liver-kidney, strengthen smew and bone, prevent miscarriage.
[Indications] Deficiency of liver-kidney, limp aching in the lower back and knees, lack of strength of sinew and bone, diziness and vertigo, vaginal bleeding during pregnancy, threatened abortion.
Chemical constituentOther aliphatic and related compounds
(*C1):
Eucommiol
(*C3):
1-Deoxyeucommiol（葉/leaf）

Monoterpenoids
iridoids:
(*C1):
Aucubin, Harpagide acetate, Ulmoside (= Aucubigenin-1-beta-isomaltose), Geniposide, Geniposidic acid

Lignans & Neolignans
(*C1,C2):
d-Pinoresinol di-O-beta-D-glucopyranoside, Liriodendrin, d-Pinoresinol O-beta-D-glucopyranoside, d-Medioresinol di-O-beta-D-glucopyranoside

Chemical structure

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Pharmacological effectParasympathomimetic action (water extract).
DNA sequenceL01917,L54066
Classical reference
(Chinese Herbal Classic "Zhenglei bencao")		※Click this image to see the actual image
DiseaseHeaviness and powerlessness in lumber and knee, Lower back pain, Impotence, Frequent urination, Irregular vaginal bleeding, Habitual abortion, Threatened abortion, Hypertension
FormulationIshoho, Kagenhachimotsuto, Kamishimotsuto, Kyukihochuto, Daibyakuchuin, Daibofuto, Hointo
Related drugsDuzhongye (Eucommia Leaf)
ReferencesJP18: The 18th edition of the Japanese Pharmacopoeia.
CP2020: Pharmacopoeia of the People's Republic of China 2020 edi.
C1)The Encyclopedia of Wakan-Yaku with Color Pictures Vol. II, pp 142-144.
C2)Outline of Pharmacognosy, a Textbook, pp 319-320.
C3)Shoyakugaku Zasshi,42,76(1988).
RemarksTochūyō is the leaf of Duzhong (Jap. name: Tochū) and sold in the market as a health food under the name of Tochūyōcha or Tochūcha. Reportedly, it has benefits in diuresis, promoting metabolic function etc. Taiwanese Duzhong is the bark of Euonymus trichocarpus Hayata of family Celastraceae (Jap. name: Togeminomasaki).
Last renewal date2021/09/27
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