In the first part, we studied the possibility of allyl as the protection group of the hydroxyl in nucleosides.

烯丙基作為糖化學(xué)中的一種常用保護基在核酸化學(xué)中有一定的應(yīng)用久久久在精品视频，曾有人將它作為磷酸酯鍵及堿基環(huán)上羰基的保護基1024手机看片金沙人妻久久，但作為核苷糖環(huán)羥基的保護基還未有研究99伦乱视频。

Based on the molecular structures, sugar alcohols can be classified into Mono sugar alcohol (such as erythritol, xylitol, sorbitol and mannitol ) and Disaccharide alcohol (such as maltitol,lactitol and isomaltitol).

糖醇是醛糖或酮糖的羰基經(jīng)氫化還原成羥基的多元醇国模视频在线；按其結(jié)構(gòu)可分為單糖醇(如四元赤蘚糖醇、五元木糖醇中国黄色一级A片免费看视频、六元山梨糖醇和甘露糖醇)A无码三级片电影免费，雙糖醇(如麥芽糖醇、乳糖醇aigao视频在线、異麥芽酮糖醇)超碰在线伊人网。

Thus, an aldohexose is a hexose that has an aldehyde group; a ketopentose is a pentose with a ketone group, etc.

因此，己醛糖是帶有醛基的己糖中文字幕av免费专区久久；戊酮糖是帶有酮基的戊糖欧美顶级黄片片一区二区，以此類推。

Mission:"equality and mutual benefit, reputation first, unity and cooperation and friendship between the long-term" supply products: ethylenediamine; diethylamide; triethylamine; Diethylenetriamine; three ethylene diamine; three ethylene amines 40; 40 Five ethylene amines; five ethylene amines 6; caprolactam; DMF; allyl amine; N, N dimethylaniline; propylamine; are butylamine; are TOA; 3 Poly Cyanamide; 1,2 c diamine; ethanolamine; diethanolamine, triethanolamine; potassium iodide, potassium hydroxide, potassium permanganate, toluene, xylene, toluene of chlorine ; Acetone, butanone; acetylacetone; ethyl acetate, butyl acetate; Y-butyrolactone; DMC; acetyl of methyl acetate; Sanfu acetyl acid; Sanfu acetyl B Ethyl; methanol, ethanol, isopropanol; propylene glycol; glycerol; propargyl alcohol; 1.3 propylene glycol; xylitol; acetic acid; have acid; mercaptoacetic acid; vary Bitterness; adipic acid; trifluoroacetic acid; oxalic acid, the amino acid; o-amygdalin acid; DL-Acid; anhydrous piperazine; six non-piperazine, furfural, castor oil, ethylene Aldehyde; glutaraldehyde, multi-POM; isopropyl ether; anisole; tetrahydropyrrole; pure pyridine; 1.2 dichloroethane; methylene chloride, chloroform, carbon tetrachloride; hydrazine hydrate; Nonylphenol;-m-cresol; Se phenol; phenol; the tert-butyl phenol; Titanium Dioxide; iron; full Tangfen; Bisphenol A; azo two different nitrile; sodium azide; sodium carbonate ; Sodium chloride; iron oxide; cuprous chloride; thionyl chloride; D4; sodium bicarbonate; ammonia, potassium chloride; anhydrous sodium sulphite; ammonium persulfate; glycol Dingmi; B Glycol ether; calcium chloride; cyclohexanone; cyclohexane, methyl tertiary butyl ether, potassium carbonate, ferric chloride, potassium nitrate; Linsuansanna; zinc oxide; sodium nitrite; antimony oxide; Tartrate; OP-10; TX-10; tablets base; AES; sodium benzoate, sodium citrate; partial sodium silicate, sodium perborate, a sodium carbonate, sodium benzene; Asia sodium chlorate; Wuluo Care products; urea; hydrochloric acid, sulfuric acid, lactic acid; amino acid, hydrogen peroxide, ammonium bicarbonate

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During these years (1997-2000) in the research area of annonaceous acetogenins 5 natural products and a number of chiral-pure analogs of annonaceous acetogenins have been synthesized using sugars as the starting materials. Their high activity and selectivity against cell line of colon tumor and a relationship between activity and configuration have been found too. In the respect of inhibitor of sialidase two new methodologies for the synthesis of chiral-pure 3-deoxy-ulosonic acid using hetero-Diels-Alder reaction or asymmetric propargylation as the key reaction were developed. On the topic of anti-leukemia marine natural product clavulactone a synthetic method based on the free radical cyclization and starting from sugar has been developed. In other title of PKC inhibited agent sphingosine a new synthetic route with SN2' as the key reaction has also been disclosed.

項目期間（1997-2000）在番荔枝內(nèi)酯方面從糖出發(fā)合成了五個天然產(chǎn)物和一批手性純的類似物，它們對腸癌細胞有很高的活性和選擇性黄色网站在线视频免费观看大全，并與構(gòu)型有關(guān)欧美男女a视频；在唾液酸酶抑制劑方面發(fā)展了二類全新手性純高碳糖的合成方法－雜原子D－A反應(yīng)或丙炔基不對稱加成為關(guān)鍵的反應(yīng)；抗白血病海洋天然產(chǎn)物群柱蟲內(nèi)酯方面研究了由糖出發(fā)和自由基環(huán)化反應(yīng)的合成方法黄色网站视频无码；對PKC 起抑制作用的鞘氨醇方面也開創(chuàng)了新的合成途徑－由糖出發(fā)并以SN2'反應(yīng)為關(guān)鍵反應(yīng)www.青草草。

Glucose an aldohexose, exists as D and L forms. The furthest asymmetric carbon from the aldehyde group is C-5. D-glucose is called D because the configuration of the atoms bonded to C-5 is the same as for D-gly- ceraldehyde. Similarly D-fructose﹙a ketohexose﹚ is designated D because the configuration

環(huán)狀結(jié)構(gòu)：醛基或酮基跟一個羥基反應(yīng)共價閉合，形式上一個糖的醛基和羥基反應(yīng)生成了一個半縮醛又黄又硬又爽又舒服视频，而一個酮基與一個羥基反應(yīng)生成一個半縮酮自拍偷拍激情网站，在同一分子內(nèi)這個反應(yīng)能進行，單糖的開鏈?zhǔn)叫纬闪颂黔h(huán)九九热这里只有精品6666，葡萄糖環(huán)形成一個六碳環(huán)久操视频是精品。

However, the first one enzyme 1-deoxy-D-xylulose 5-phosphate synthase gene and the second one enzyme 1-deoxy-D-xylulose 5-phosphate reductoisomerase gene in MEP pathway had been reported and expressed in the latex of rubber tree, indicating that MEP pathway may be involved in rubber biosynthesis.4 - hydroxy -3 - methyl -2 -- butenyl -4 - phosphate reductaseis the last enzyme that catalytic 4 - hydroxy -3 - methyl -(2E)- butenyl -4 - phosphate to generate isopentenyl pyrophosphate.

然而已有報道MEP途徑中第1個酶1-脫氧-D-木酮糖-5-磷酸合成酶（1-deoxy-D-xylulose 5-phosphate synthase，DXS）基因和第2個酶1-脫氧-D-木酮糖-5-磷酸還原酶（1-deoxy-D-xylulose 5-phosphate reductoisomerase ，DXR）基因在橡膠樹膠乳中的表達永久自慰网站喷水，這表明MEP途徑可能參與橡膠的生物合成色五月综合在线。4-羥基-3-甲基-2--丁烯基-4-磷酸還原酶（4-hydroxy -3-methyl-2--butenyl-4-diphosphate reductase，HDR）是異戊烯基焦磷酸合成途徑之一甲基赤蘚糖磷酸（methylerythritol phosphate国产专区精品调教捆绑在线播放，MEP）途徑中的最后一個酶在线观看视频网站黄色，催化4-羥基-3-甲基-(2E)-丁烯基-4-磷酸生成異戊烯基焦磷酸。

Mission:"equality and mutual benefit, reputation first, unity and cooperation and friendship between the long-term" supply products: ethylenediamine; diethylamide; triethylamine; Diethylenetriamine; three ethylene diamine; three ethylene amines 40; 40 Five ethylene amines; five ethylene amines 6; caprolactam; DMF; allyl amine; N, N dimethylaniline; propylamine; are butylamine; are TOA; 3 Poly Cyanamide; 1,2 c diamine; ethanolamine; diethanolamine, triethanolamine; potassium iodide, potassium hydroxide, potassium permanganate, toluene, xylene, toluene of chlorine ; Acetone, butanone; acetylacetone; ethyl acetate, butyl acetate; Y-butyrolactone; DMC; acetyl of methyl acetate; Sanfu acetyl acid; Sanfu acetyl B Ethyl; methanol, ethanol, isopropanol; propylene glycol; glycerol; propargyl alcohol; 1.3 propylene glycol; xylitol; acetic acid; have acid; mercaptoacetic acid; vary Bitterness; adipic acid; trifluoroacetic acid; oxalic acid, the amino acid; o-amygdalin acid; DL-Acid; anhydrous piperazine; six non-piperazine, furfural, castor oil, ethylene Aldehyde; glutaraldehyde, multi-POM; isopropyl ether; anisole; tetrahydropyrrole; pure pyridine; 1.2 dichloroethane; methylene chloride, chloroform, carbon tetrachloride; hydrazine hydrate; Nonylphenol;-m-cresol; Se phenol; phenol; the tert-butyl phenol; Titanium Dioxide; iron; full Tangfen; Bisphenol A; azo two different nitrile; sodium azide; sodium carbonate ; Sodium chloride; iron oxide; cuprous chloride; thionyl chloride; D4; sodium bicarbonate; ammonia, potassium chloride; anhydrous sodium sulphite; ammonium persulfate; glycol Dingmi; B Glycol ether; calcium chloride; cyclohexanone; cyclohexane, methyl tertiary butyl ether, potassium carbonate, ferric chloride, potassium nitrate; Linsuansanna; zinc oxide; sodium nitrite; antimony oxide; Tartrate; OP-10; TX-10; tablets base; AES; sodium benzoate, sodium citrate; partial sodium silicate, sodium perborate, a sodium carbonate, sodium benzene; Asia sodium chlorate; Wuluo Care products; urea; hydrochloric acid, sulfuric acid, lactic acid; amino acid, hydrogen peroxide, ammonium bicarbonate

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In order to decrease toxicities of retinods and enhance pharmacal effects and gain the relative derivatives with better curing effect and selectivity, structures of retinoic acids were modified by inducing glycosyl groups in this paper.

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Several glycosyl phosphate and phosphonates, as inhibitors of AGPase, were synthesized.In the synthesis of β〓-6 linked oligosaccharide phosphonates, A new method was developedfor preparation of 〓,6-〓-di-acetyl-2,3,4-〓-tri-benzyl-D-hexoses by acetylation of benzylatedmethyl glycosides in high yield under the conditions of 〓 and cat.〓.

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