查询词典 o-dihydroxybenzene

Result: Eight compounds were isolated and they were identified as β-sitosterol (1), succinic acid (2), luteolin-7-O-β-D-glucoside (3), uracil (4), apigenin (5), chrysoeriol (6), chrysoeriol-7-O-β-D-glucoside (7), and apigenin-7-O-β-D-glucoside (8). Conclusion: Compound 4-8 were isolated from L.

结果：从藏药短管兔耳草醋酸乙酯提取物中分离得到8个化合物，经鉴定分别为β-谷甾醇（1），琥珀酸（2），木樨草素-7-O-β-D-葡萄糖苷（3），尿嘧啶（4），芹菜素（5），柯伊利素（6），柯伊利素-7-O-β-D-葡萄糖苷（7）和芹菜素-7-O-β-D-葡萄糖苷（8）。

In the passivated REBAR electrode surface formed by ORCs the grain observed from AFM examination is composed of γ-Fe〓O〓 and Fe〓O〓 0 At+0.7V, the passive film on REBAR electrode formed by single-step polarization is composed of Fe (Ⅲ oxide highly doped by Fe〓. In some areas, small γ-Fe〓O〓 particals or some polymeric structure which contains dioxy and dihydroxy bridging bonds between the iron atoms may also exist in the other region.

通过AFM实验观察到的钢筋电极经循环电位扫描至+0.7V形成的钝化膜中具有的结晶颗粒主要由γ-Fe〓O〓和Fe〓O〓·yH〓O0 阶跃电位形成的钢筋钝化膜在+0.7V下主要是由掺杂了大量Fe〓的三价铁氧化物构成，在某些微小的区域可能存在γ-Fe〓O〓微晶，而在另外一些区域则具有聚合物膜的结构。

National Day Golden Week holidays, Mid-Levels Yong Jing Yuan will launch 200 sets of fine grand ex gratia units will also be introduced flatly price concessionary units, including 183 foreign and pursued the age-in-O sky gardens, 270 degrees, 102 master of the Housing Great Piaochuang O 3 and 85-O of the Housing tight Xiao San Housing units.

国庆黄金周期间，半山雍景苑将隆重推出200套精品特惠单位，此外，还将推出一口价特惠单位，包括倍受追捧的183？O空中花园老少居、270度主人房大飘窗的102？O三房和85？O布局紧凑的小三房单元。

Research results of phase equilibrium for the KOH—K〓CrO〓—H〓O system, the KOH—KAlO〓—H〓O system and the KOH—K〓CrO〓—KAlO〓—H〓O system revealed that lower concentration of KOH was beneficial for the crystallization of KAlO〓, and within a certain range, higher concentration of KOH was favorable for the crystallization of K〓CrO〓.

KOH—K〓CrO〓—H〓O体系，KOH—KAlO〓—H〓O体系和KOH—K〓CrO〓—KAlO〓—H〓O体系相平衡研究结果表明，较低的氢氧化钾浓度有利于铝酸钾结晶析出，一定范围内，较高的氢氧化钾浓度有利于铬酸钾结晶析出，因此，通过控制氢氧化钾浓度可以使铬酸钾—铝酸钾—氢氧化钾得以分离。

These compounds were identified as follows:chrysophanol (FP-1),physcion(FP-2),eriosematin(FP-3),scoparone(FP-4),lupeol(FP-5),betulinic acid(FP-6),3\',4\'-Dihydroxy-trans-cinamic acid octacosyl ester(FP-7),β-sitosterol (FP-8),flemiphilippinone A(FP-9),monopalmitin(FP-10),emodin(FP-11),islandicin (FP-12),salicylic acid(FP-13),p-methoxyphenylpropionic acid(FP-14),trideca-1, 3-diene(FP-15),lupinifolin(FP-16),flemichin D(FP-17),flemiphilippinin A(FP-18), auriculasin(FP-19),erythrinin B(FP-20),6-C-prenylluteolin(FP-21), 8-(1,1-dimethylallyl) genistein(FP-22),flemiphilippinin E(FP-23),flemiphilippinin F (FP-24),5,7,3\',4\'-tetrahydroxy-6,8-diprenylisoflavone(FP-25),flemiphilippinin D (FP-26),dorsmaninsⅠ(FP-27),osajin(FP-28),6,8-diprenyleriodictyol(FP-29), lupinalbin A(FP-30),genistein(FP-31),3\'-O-methylorobol(FP-32),orobol(FP-33), 5,7,2\',3\',4\'-pentahrdroxyflavone(FP-34),the mixture of biochanin A and prunetin (FP-35 and 36),genistin(FP-37),sophororicoside(FP-38),3\'-O-methylorobol-7-glucoside(FP-39),the mixture of sissotrin and prunetin 4\'-O-β-D-glucoside(FP-40 and 41),adenosine(FP-42) and luteoloside(FP-43,mixture).

这些化合物分别为大黄酚(FP-1)、大黄素甲醚(FP-2)、eriosematin(FP-3)、滨蒿内酯(FP-4)、羽扇豆醇(FP-5)、白桦酸(FP-6)、咖啡酸二十八烷酯(FP-7)、β-谷甾醇(FP-8)、蔓性千斤拔酮A(FP-9)、单棕榈酸甘油酯(FP-10)、大黄素(FP-11)、islandicin(FP-12)、水杨酸(FP-13)、对甲氧基苯丙酸(FP-14)、十三烷-1，4-二烯烃(FP-15)、lupinifolin(FP-16)、千斤拔素D(FP-17)、蔓性千斤拔素A(FP-18)、auriculasin(FP-19)、erythrinin B(FP-20)、6-C-异戊烯基木犀草素(FP-21)、8-(1，1-二甲烯丙基)-染料木黄酮(FP-22)、蔓性千斤拔素E(FP-23)、蔓性千斤拔素F(FP-24)、5，7，3′，4′-四羟基-6，8-双异戊烯基异黄酮(FP-25)、蔓性千斤拔素D(FP-26)、dorsmaninsⅠ(FP-27)、osajin(FP-28)、6，8-双异戊烯基圣草素(FP-29)、lupinalbin A(FP-30)、染料木黄酮(FP-31)、3\'-O-甲基香豌豆苷元(FP-32)、奥洛醇(FP-33)、5，7，2′，3′，4′-五羟基黄酮(FP-34)、鹰嘴豆素甲和樱黄素的混合物(FP-35和FP-36)、染料木苷(FP-37)、槐属苷(FP-38)、7-葡萄糖基-3\'-O-甲基香豌豆苷(FP-39)、印度黄檀苷和樱黄素4′-O-β-D-葡萄糖苷的混合物(FP-40和FP-41)、腺嘌呤核苷(FP-42)和木犀草苷(FP-43，混合物)。

A modified γ-Al〓O〓 was prepared by a special precipitation method with aluminum nitrate solution containing a certain amounts of orthosilicic acid and ammonia aqueous solution. Compared with commercial γ-Al〓O〓, the modified γ-Al〓O〓 was an effecient catalyst for dehydration of tetrahydrofurfuryl alcohol to dihydropyran. The results revealed that the strong acid sites on the surface of the catalyst may play a crucial role in this reaction.

并以硝酸铝和氨水为原料，用沉淀法制备出一种高比表面和拥有较多强酸中心的γ-Al〓O〓，它在四氢糠醇开环脱水制备二氢吡喃的反应中有优良的催化活性，通过比较此γ-Al〓O〓和普通商业γ-Al〓O〓的Py-TPD图，发现强酸中心在制备二氢吡喃的反应中可能具有关键的作用。

With this set of criteria, the literatures published 3—O—L—rhamnosyl—(1→2/1→4)—L— rhamnoside, 3—O -D—xylosyl—(1→2/1→4)-L-rhamnoside and 3-O-D — glucosyl-(1 →2/1→4)—L— rhamnoside structures of anhydroicaritin and desmethylanhydroicaritin were re-evaluated.

本文以上述双糖1→2连接的光谱标准，对文献报道的脱水淫羊藿素和去甲脱水淫羊藿素3—O—L一鼠李糖—(1→2或1→4)—L—鼠李糖甙、3—O—D—木糖—(1→2或1→4)—L—鼠李糖甙及3—O—D—葡萄糖—(1→2或1→4)—L—鼠李糖甙类化合物的结构进行了重新评价。

The present invention concerns the compounds having the formula N-oxides, salts, stereoisomeric forms, racemic mixtures, prodrugs, esters and metabolites thereof, wherein R1 and R8 each are H, optionally substituted C1-6alkyl, C2-6alkenyl, C3-7cycloalkyl, aryl, Het1, Het2; R1 may also be a radical of formula (R11aR11b)NC(R10aR10b)CR9-; t is 0, 1 or 2; R2 is H or C1-6alkyl; L is -C-,-O-C-,-NR8-C-,-O-C1-6alkanediyl-C-,-NR8-C1-6alkanediyl-C-,-S2-,-O-S2-,-NR8-S2 ; R3 is C1-6alkyl, aryl, C3-7cycloalkyl, C3-7cycloalkylC1-4alkyl, or arylC1-4alkyl; R4 is H, C1-4alkylOC, carboxyl, aminoC, mono- or di(C1-4alkyl)aminoC, C3-7cycloalkyl, C2-6alkenyl, C2-6alkynyl or optionally substituted C1-6alkyl; R5 and R6 are H or C1-6alkyl.

本发明涉及右式化合物其N-氧化物、盐、立体异构形式、外消旋混合物、前药、酯及代谢物，其中R 1 及R 8 各是氢、C 1-6 烷基、C 2-6 烯基、C 3-7 环烷基、芳基、Het 1 、Het 2 ；R 1 也可以是式(R 11a R 11b )NC(R 10A R 10b )CR 9 -之基；t是0、1或2；R 2 是氢或C 1-6 烷基；L是-C-、-O-C-、-NR 8 -C-、-O-C 1-6 烷二基-C-、-NR 8 -C 1-6 烷二基-C-、-S 2 -，-O-S 2 -、-NR 8 -S 2 -；R 3 是C 1-6 烷基、芳基、C 3-7 环烷基、C 3-7 环烷基C 1-4 烷基或芳基C 1-4 烷基；R 4 是氢、C 1-4 烷基OC、羧基、氨基C、一-或二(C 1-4 烷基)氨基C、C 3-7 环烷基、C 2-6 烯基、C 2-6 炔基或任选被取代的C 1-6 烷基；R 5 及R 6 是氢或C 1-6 烷基。

By the nucleophilic substitution reaction of 6-O-tosyl-l,2:3,4-di-O- isopropylidene-a-Z-galactopyranose (3) with some substituted 1, 2,4- triazole-3-thiols (4a ~ 4c) or 1, 2, 3,4-tetrazole-5-thiols (5a~5f), nine 6-S-(substituted triazolyl or tetrazolyl)-l,2 : 3,4-di-O- isopropylidene-a-D-galactopyranoses (6a ~ 6i) were prepared in high yields. Their structures and configurations were analyzed and established by elemental analysis, IR, NMR, MS spectra.

报道了6－O－对甲苯磺酰基－1，2：3，4－二－O－异亚丙基－α-D吡喃型半乳糖（3）与取代的3－巯基三唑或5－巯基四唑4a-4c或5a-5f的亲核取代反应，合成了9个6－S－－1，2：3，4－二－O－异亚丙基－α- D吡喃型半乳糖（6a-6i），通过元素分析，IR，NMR和MS确证了上述化合物的结构，并经分子模型计算进行了其构象分析。

Meanwhile the defects are also studied by means of the methods of EPR, PSL, thermostimulated luminescence and absorption spectroscopy. These results indicate that the principal defects are F centers and O〓 in PSL. O〓 centers are formed by O〓 ions substituting for F ions with a trapped hole The trap depth of two kinds of F centers is obtained by using thermoluminescent spectra.

同时还利用电子顺磁共振谱，光激励发光，热释发光和吸收光谱的方法，研究了其材料中缺陷的性质，实验结果表明在光激励发光过程中主要的缺陷是F心和O〓心，其中，O〓心是O〓离子替代F〓离子并束缚一个空穴而形成的局域中心。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。