Twenty compounds have been isolated and structure-elucidated, ten of which were new compounds including one new skeleton diterpene malloapeltin A, 5 cembrene-type diterpenes, two dolabradane-type diterpenoids, one triterpene ester malloapeltin B and one coumarinolignoid compound 5'-demethyl aquillochin.

其中有10個(gè)是新化合物www日韩一区二区在线播放，包括一個(gè)新骨架的二萜第1页欧美高清视频看片在线观看网站，五個(gè)枯烯類的二萜又粗又猛又黄又爽的视频，兩個(gè)羅柏烷型的二萜人妻基地，一個(gè)三萜的對(duì)苯二甲酸酯和一個(gè)香豆素木脂體類化合物欧美激情中文字幕第八页视频。

The organoboron compounds in this paper are based on triarylboranes, boronic acids and boronic esters. The structure-property relationship and sensing mechanism are elucidated. Organoboron compounds as Lewis acid can be used as fluoride probe with high sensitivity and selectivity because they have a unique LUMO in which the π-conjugation is divergently extended through the vacant p-orbital of the boron atom. The complexation of the boron π-electron systems with fluoride ion would interrupt the π-conjugation extended through the boron atom, causing the change of photophysical properties.

介紹了基于三芳基硼化合物、硼酸和硼酸酯的有機(jī)硼化合物在氟離子檢測(cè)中的應(yīng)用真人一进一出抽搐gif免费404，評(píng)述了這些化合物的結(jié)構(gòu)和檢測(cè)性能之間的關(guān)系精品国模一区二区，討論了檢測(cè)機(jī)理，即有機(jī)硼化合物中硼原子空的p軌道使其作為路易斯酸能夠選擇性地結(jié)合氟離子变态自拍日韩欧美在线观看视频网站，硼原子與氟離子的結(jié)合破壞了硼中心與芳香取代基的p-π共軛尤物在线草草一区二区，引起有機(jī)硼化合物光物理性質(zhì)的變化，從而實(shí)現(xiàn)對(duì)氟離子的高選擇性檢測(cè)欧美也操也射视频。

Compounds 1, 2, 3, 4, 5and 6 were new compounds. Compound 9 was obtained from Chinese eaglewood for the first time.

其中化合物1来部一级毛片，2，3,,草草影院欧美视频，4全网男人的天堂网站， 5和6為新化合物，化合物9為首次從國產(chǎn)沉香中分離到的化合物91精品国产91热久久久久福利。

To develop new reactions, new compounds and new materials is always the effortful direction of chemical workers, and to obtain valuable products by using compounds which are existing, easily available and cheap is our pursuing goal all the time.

新反應(yīng)人人插人人操人人摸、新物質(zhì)和新材料的開發(fā)一直是化學(xué)工作者們努力的方向，利用現(xiàn)有的久久夜色精品国产高清不卡、易得的和低成本的原料制備出實(shí)用的化合物始終是我們追求的目標(biāo)大学生女毛片在线现观看。

It concluded:(1) the fifteen compounds, which were supposed to affect Pseudoperonospopa cubensis and Botrytis cinera of leaf cuttings of cucumber, Rhizoctonia solani of rice and Erysiphe graminis of wheat seedlinds, were tested indoors. Some of the compounds showed highly fungicidal activities.

115個(gè)系列化合物在室內(nèi)分別對(duì)離體葉黃瓜霜霉病、離體葉黃瓜灰霉病情网址、水稻紋枯病和苗期小麥白粉病的致病菌進(jìn)行了化合物的普篩藥效試驗(yàn)91自拍视频国产，其中，有些化合物顯示出較高的殺菌生物活性欧美精品品综合一区二区。

The compounds were identified by physical and spectroscopic techniques.Result:Six compounds were isolated and identified as 4,4′-biisofraxidin(1),esculetin(2),fraxetin(3),scoparone(4),isofraxidin(5),scopoletin(6),respectively.Conclusion:Compound 1 is a novel natural product.

結(jié)果：首次從草珊瑚干燥全草中分離得到6種具有抗菌活性的香豆精類化學(xué)成分在线观看黄色网站大全，分別為4，4′-雙異嗪皮啶(4午夜催催精免费福利视频，4′-biisofraxidin，1)亚洲中文字幕超碰无码资源，秦皮乙素(esculetin99黄色视频在线观看高清资源在线观看，2)，秦皮素(fraxetin亚洲国产三级视频免费看，3)精品丝袜国产自在线拍Av，濱蒿內(nèi)酯(scoparone，4)欧美无遮挡一区二区三区，異嗪皮啶(isofraxidin男人天堂网站，5)，東莨菪內(nèi)酯(scopoletin日韩欧美精品综合，6)国产爽爽爽网。

Fibrocystic disease of breast/tcm ther;compounds/ admin;compounds/ pharmacol;sex hormones/blood

纖維囊性病，乳腺/中醫(yī)藥療法；復(fù)方/投藥和劑量伊人久久综合一区；復(fù)方/藥理學(xué)久久国产免费高清视频观看；激素類/血液

The recent progress in electroluminescence device including spiro compounds of fluorene and anthracene is discussed in this paper. The synthetic methods of double-spiro and single-spiro organic compounds together with EL devices are described in detail.

對(duì)近年來含芴、蒽螺環(huán)結(jié)構(gòu)發(fā)光材料的研究進(jìn)展進(jìn)行了總結(jié)看片a免费观看视频大片，重點(diǎn)介紹了含有雙螺华人在线精品免费观看、單螺結(jié)構(gòu)的有機(jī)電致發(fā)光材料的結(jié)構(gòu)和特性，給出了部分有機(jī)化合物的合成方法欧美变态性爱视频一区二区。

Three new fulvene polymeric compounds, namely 1[Ag (L3]CH2C12 , 2[Ag2(L25(H2O)(S03CF3)2]0.5C6H6 and 3 Mn(L42(C2H5OH)2 , were synthesized, respectively. Compounds 1 and 2 reported herein represent the organometallic polymers based on both Ag-N and Ag-C coordination interactions. In the solid state, compound 3 are bound together by strong intermolecular N H-O hydrogen bonding system into a supramolecular one-dimensional H-bonded chain.B.

一看成年人视频、富烯有機(jī)配體的合成及與金屬離子的反應(yīng)化學(xué)利用富烯負(fù)離子的芳酰化反應(yīng)和Heck-偶聯(lián)反應(yīng)合成了富烯配體L1-L18亚洲三级视频在线，并合成了三個(gè)基于富烯配體的金屬有機(jī)配位聚合物1[Ag(L3]·CH_2Cl_2热久久久久、2[Ag_2(L25(H_2O)(SO_3CF_3)_2]·0.5C_6H_6和氫鍵驅(qū)動(dòng)的超分子聚集體3Mn(L4_2(C_2H_5OH)_2。

The primary performances of nitrogen-rich compounds on the gas generant composition of automobile crash airbag system are studies. Based on the closed bomb tests, the P—t curves are obtained and compared with NaN〓. It is shown that the burning velocity of five compounds are higher than that of NaN〓.

研究了富氮化合物作為氣體發(fā)生劑使用的基礎(chǔ)性能一区二区亚洲欧美日韩另类，采用密閉爆發(fā)器法測(cè)出了它們?nèi)紵^程的P-t曲線6080国产午夜精品，并與常用的疊氮化鈉類氣體發(fā)生劑的性能進(jìn)行了比較，結(jié)果表明其中5種藥劑的燃燒速度優(yōu)于疊氮化鈉欧美十八禁柔术在线视频。