7,8-Dihydroxycoumarin

7,8-Dihydroxycoumarin 속성

7,8-Dihydroxycoumarin C화학적 특성, 용도, 생산

개요

Daphnetin, mainly extracted from Yu Ruixiang Changbai Daphne (Daphne Korean Nakai), Daphne giraldii Nitsche bark, and root bark, is the main efficacy component of the plants D.tangutica Maxim and D.retttsa Hemsl. Changbai daphnes has the pharmacological effects of warming the spleen and stomach, relaxing the muscles and joints, and promoting circulation. In TCM, it’s commonly used as medicines for treatment of injuries. Because Changbai daphne is a pungent and warm natured herbal medicine, it was used to warm the spleen and stomach by dispelling cold.

물리적 성질

Appearance: white or off-white powder, odorless, and tasteless; Solubility: slightly soluble in methanol (equilibrium solubility of 485.4? μg/mL), slightly soluble in ethanol (equilibrium solubility of 230.06?μg/mL), and insoluble in water (equilibrium solubility of 176.7?μg/mL) ; Melting point: 262–264?°C.

역사

Changbai daphne, a Chinese traditional medicine in clinic, is mainly used for treatment of coronary heart disease, rheumatoid arthritis, thromboangiitis obliterans, etc. Changbai daphne belongs to the first-class protective plants in Jilin province in China, and the rarity restricted the drug development. Scientists tried to find the effective components of Changbai daphne. In 1977, scientists of phytochemistry research group in the Traditional Chinese Medicine research laboratory from Jilin institute of Chinese medicine first successfully isolated the crystalline monomer?– daphnetin?– from the plant. Pharmacological results show that the pharmacological activities of this crystal are equal to Changbai daphne, which suggested the crystal is the main active ingredient . Through the condensation reaction experiment using equimolecular pyrogallic acid, malic acid, and twice the amount of sulfuric acid, under heating reaction, scientists successfully got pale yellow needle daphnetin crystals. From then on artificially synthesized daphnetin has been successfully implemented . A large-scale industrial production can be acquired. The followup researches on the metabolism and pharmacological activity of daphnetin were carried out. In 2009, the State Food and Drug Administration of China approved daphnetin capsule to be used in the clinical.

용도

Daphnetin is a natural coumarin derivative providing anti-inflammatory and protective properties to those suffering from lung injury.

Indications

This product is contained in national standards for chemical drugs, mainly used in Buerger’s disease, occlusive vascular disease, and coronary heart disease.

일반 설명

This substance is a primary reference substance with assigned absolute purity (considering chromatographic purity, water, residual solvents, inorganic impurities). The exact value can be found on the certificate. Produced by PhytoLab GmbH & Co. KG

Pharmacology

Daphnetin pharmacological effect mainly includes: 1. Improvement of the cardiovascular system function； 2. Effects on the central nervous system. Daphnetin also acts on the NF-k B and NFAT signal pathway and results in immune inhibition; it is also used for the treatment of malaria parasite and Pneumocystis carinii infection by chelating to Fe2 + or by acting on ribonucleotide reductase; daphnetin shows bacteriostatic effects on gold grapes, Escherichia coli, Shigella’s blessing, and Pseudomonas aeruginosa by inhibiting succinic acid oxidase in mitochondria in bacteria; daphnetin reduces the incidences of diarrhea in model mice by inhibiting mice gastrointestinal propulsive movement and has a stronger toxic effect on several important aphids .
Plasma protein binding of Daphetin is low. The urinary excretion is higher. The distribution volume is relatively larger. Both of metabolism and excretion are rapid. Drug elimination is mainly through the kidney with a half-life of only 15 min. The tissue distributions after intravenous injection and oral administration are equal. Daphnetin may distribute in the brain through the blood-brain barrier. The metabolites have poor stability and low oral bioavailability. People have studied the metabolic pathways and metabolic product. Daphnetin may be the substrates of MRP2 and BCRP transporters, and thus intestinal absorption is affected; in the plasma of rats, the main metabolite are 7-O and 8-O glucoside substitution products which are mediated by UT1A6 and UT1A9. The anti-inflammatory activity of the metabolites is dependent on daphnetin-7-methyl ether.

Clinical Use

It has been verified by a large number of clinical cases that oral daphnetin capsule can significantly improve thromboangiitis obliterans; oral daphnetin has a better curative effect than intramuscular injection of Changbai daphne in patients with angina pectoris due to coronary heart disease. Daphnetin shows an obvious analgesic sedative effect on surgical and nonsurgical pain-relieved patients after intravenous drip or injection of daphnetin; oral daphnetin capsule shows significant therapeutic effects on rheumatoid arthritis.
There are no reports about serious adverse reactions. Two cases of whole-body red itch were reported. It sometimes has mild gastrointestinal reaction when continuously used.

Purification Methods

Crystallise it from aqueous EtOH. It can be sublimed. [Beilstein 18/3 V 202.].

7,8-Dihydroxycoumarin 준비 용품 및 원자재

원자재

준비 용품

7,8-Dihydroxycoumarin 공급 업체

공급자	전화	이메일	국가	제품 수	이점
Hebei Mojin Biotechnology Co., Ltd	+8613288715578	sales@hbmojin.com	China	12456	58
Ouhuang Engineering Materials (Hubei) Co., Ltd	+8617702722807	admin@hbouhuang.com	China	2259	58
Capot Chemical Co.,Ltd.	571-85586718 +8613336195806	sales@capotchem.com	China	29797	60
Shanghai Zheyan Biotech Co., Ltd.	18017610038	zheyansh@163.com	CHINA	3620	58
career henan chemical co	+86-0371-86658258	sales@coreychem.com	China	29914	58
Chengdu Biopurify Phytochemicals Ltd.	+8618080483897	sales@biopurify.com	China	3424	58
Hebei Guanlang Biotechnology Co., Ltd.	+86-19930503282	alice@crovellbio.com	China	8823	58
Hubei xin bonus chemical co. LTD	86-13657291602	linda@hubeijusheng.com	CHINA	22968	58
Chongqing Chemdad Co., Ltd	+86-023-61398051 +8613650506873	sales@chemdad.com	China	39916	58
Shanghai Standard Technology Co., Ltd.	18502101150	ft-sales@nature-standard.com	CHINA	1923	58

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