香豆素

Twelve of single- and double-armed probes were designed by introducing various receptors containing N, O and S atoms to the comarins.

设计、合成了十二个含有N、O和S原子的不同识别基团单臂和双臂单香豆素荧光团分子探针。

7-Hydroxy-4-methylcoumarin was synthesized from ethyl acetoacetate and m-dihydroxybenzene by the Pechmann condensation using phenyl sulfonic acid as catalyst under solvent-free conditions.

摘 要：以苯磺酸作催化剂，乙酰乙酸乙酯和间苯二酚为原料，通过Pechmann缩合反应合成7-羟基-4-甲基香豆素。

Objective To observe the effects of coumarins from Radix Angelicas Dahurica on 5-hydroxytryptamine (5-HT),5-OH-indoleacetic acid(5-HIAA) and dopamine contents in the brain tissues of mice with inflammatory pain.

目的观察白芷香豆素对炎性疼痛小鼠脑组织中5-羟色胺(5-HT)、5-吲哚乙酸(5-HIAA)及多巴胺含量的影响。

Aryl azides are by far the most frequently used photoaffinity probes because they can be easily synthesized, as well as being chemically stable in the dark and highly reactive upon photoirradiation.

与普通的芳基叠氮基团相比，全氟取代的芳基叠氮基团具有更高的光标记效率；而香豆素的叠氮衍生物则同时具有荧光标记能力和光亲合标记能力，具有更广泛的应用潜力。

Chinensis by the methods of column chromatography (normal and reversed phase silica gel, Sephadex LH-20), preparative TLC and HPLC. On the basis of spectroscopic methods including IR, ESI-MS, 1-D and 2-D NMR, forty eight of them were identified as seventeen flavonoids, seventeen tritepenoids, one cumarin, five steroids and some benzene derivative etc.

中药射干为射干植物的干燥根茎，从中共分离出53个化合物，通过红外、质谱及核磁共振等波谱方法鉴定了包括12个新化合物在内的48个，结构类型分别属于iridal型三萜及其新颖的二聚体、异黄酮、黄酮及黄酮醇、香豆素、甾体、芳香酸和脂肪酸及其甘油酯等。

Objective: To investigate the influence of the different style of follow-up visit to the anticoagulation effect of warfarin.

目的：探讨不同的随访方式对苄丙酮香豆素钠抗凝疗效的影响。

ResultsCommon pternopetalum root has the typical structure of Angelica plant and includes the compositions of Coumarins、 terpenoid、 volatile oil.

结果紫金砂根具有伞形科当归属植物的典型结构，紫金砂根主要含有香豆素、萜类、挥发油等化合物。

Compounds 1, 14, 20-24 were isolated from the roots and rhizomes of N.

化合物1，14，20～24为首次从裂叶羌活根和根茎中分离得到；化合物1为倍半萜类化合物，化合物14为6，7-呋喃型香豆素，化合物20～24为苯丙素类化合物。

Current study shows that the objectives of study mainly are flavonoids,quinones,alkaloids and coumarins,in terms of pharmacologies of antitumor,antivirus and antimicrobial,as well as optical and magnetic properties,which will provide valuable conclusions on the multiple structures and properties of natural metal complexes with natural medicines,especially for the application development of new anti-tumour ...

研究对象包括黄酮类化合物、生物碱、香豆素和醌类化合物，性质研究主要在抗菌、抗病毒及抗癌方面以及光学和磁学活性方面。这些研究为开发抗癌新药以及研究天然药物金属配合物结构的多样性和性质的多重性方面提供一些有价值的结论。

Results: With dicoumarol pretreatment, serum QR activity was significantly decreased.

结果：经双香豆素处理组血清QR催化活性显著降低。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。