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The preparation method comprises removing benzyl of the compound IV0 in alkali condition to obtain the compound (V, reacting the compound with benzyl chloroformate to obtain the compound, wherein the compounds can be used to prepare 5-substituted-hydride indolizine natural alkaloids.

本发明所提供的制备方法是将化合物在碱性条件下去苄基得到的化合物，将化合物与氯甲酸苄酯反应，生成的化合物。和化合物可以用于制备5-取代-氢化中氮茚天然生物碱。

Part two: Using chloroformic ester reacted with potassuim thiocyanate to get thiocyanic esters. Then reacted with biological substituted pyrimidinamine to synthesize forty two thiourea compounds, thirty eight of them are new compounds. Their structures have been charactered by IR, 1H NMR and elemental analysis.

第二部分：先以氯甲酸酯和硫氰酸钾为原料合成异硫氰酸酯，再与有生物活性的取代氨基嘧啶反应，合成了一系列新的取代嘧啶基硫脲类化合物，合成的42个化合物中有38个为首次合成的新化合物，结构经元素分析、IR及~1H NMR得到确证。

It hold well foreground of sciences and commercial application such as oceanic polymetallic concretion, cobaltic ag1omeration, polymetallic sulfide, natural hydrate and deep-sea hot spring creatures. The abundance resources were called the strategic substituted energy of human sustainable development.

大洋多金属结核、富钴结壳、多金属硫化物、天然气水合物、深海热泉生物等新型资源具有很好的科研与商业应用前景，被誉为21世纪人类可持续发展的战略接替能源。

Others add dairy cream. A Chi Chi is identical to a Pia Colada, except that vodka is substituted for rum.

有胃病的人喝了它，可促进胃酸分泌，食后非但不气胀、腹泻，反而通气、消食。

According to the 13CNMR chemical shifts of substituted benzene, conjugative effect parameter and inductive effect parameter are established.

以取代苯苯环碳原子化学位移为依据，用曾经设定并初步证实的甲基诱导效应和共轭效应参数，讨论了甲基取代基的诱导效应、共轭效应及定位效应。

Three isomorphic pendant derivatives based on monovacant Keggin heteropolytungstate [SiW11O39]8- as building block have been synthesized through the decoration of Co-Im complexes using bench method:5Na_4H_2[SiW_(11)O_(39)CoIm]_(0.63)[SiW_(11)O_(39)Co(H_2O)]_(0.37)·7H_2O (1)_6[SiW_(11)O_(39)NiIm]_(0.8)[SiW_(11)O_(39)Ni(H_2O)]_(0.2)·7H_2O (2)_4Na_6[SiW_(11)O_(39)MnIm]_(0.69)[SiW_(11)O_(39)Mn(H_2O)]_(0.31)·7.5H_2O (3) Complexes 1–3 are the first examples of crystallographically characterized 3d-transition metal mono-substituted POMs with an antenna organic ligand synthesized under normal bench conditions.

以单缺位Keggin型杂多钨硅酸盐[SiW11O39]8-为建筑单元，在水溶液中通过过渡金属-咪唑配合物的修饰，成功地获得了三个同构的悬臂式衍生物：5Na_4H_2[SiW_(11)O_(39)CoIm]_(0.63)[SiW_(11)O_(39)Co(H_2O)]_(0.37)·7H_2O (1)_6[SiW_(11)O_(39)NiIm]_(0.8)[SiW_(11)O_(39)Ni(H_2O)]_(0.2)·7H_2O (2)_4Na_6[SiW_(11)O_(39)MnIm]_(0.69)[SiW_(11)O_(39)Mn(H_2O)]_(0.31)·7.5H_2O (3)它们是第一例在常规水溶液条件下合成得到的X-射线表征的3d-过渡金属取代的悬臂式多酸衍生物。

The major products were methane, ethylene, propylene, butylene, butadiene, cyclopentadiene, benzene, toluene, styrene, vinyl-substituted cyclopentene derivatives and C5/C6 isomers pentadiene, met...

热裂解主要产物为甲烷、乙烯、丙烯、丁烯、丁二烯、环戊二烯、苯、甲苯、苯乙烯、环戊烯的乙烯基取代物及C5，C6异构体(戊二烯、环戊烯的甲基取代物、环己烯、己二烯和环戊二烯甲基取代物)，其中，C1～C4、环戊二烯、苯、甲苯、乙烯基取代环戊烯为初始产物。

20% of the diastatic fermented feed made by five germs (C. utilis, C. tropicalis, Sacharomyses cereuisiae, Aspergillus niger and Geotrichum candidum) substituted for the daily grain of meat rabbits to analyze the increased weight, feed consumption, fat digestibility, utilization rate of protein and the rate of viscera to body weight of the meat rabbit.

方法］用5种菌制备糖化发酵饲料，并以20%的比例替代肉兔日粮，对肉兔增重、饲料消耗、脂肪消化率、蛋白质利用率及脏体比等各项指标进行比较分析。

The cage effect of Gn potassium aqueous solution calculated by theα-cleavage photoreaction product distribution of substituted dibenzyl ketone was 14%, 18%, 22% and 42% for generations 1-4, respectively, which indicates that G4 takes a more close spherical shape with strong confine ability.

研究结果表明，羧基为末端基团的芳醚树枝形聚合物Gn (n = 1-4)钾盐水溶液笼效应随代数增加而增大，从G1到G4，笼效应分别为14%、18%、22%和42%，树枝形聚合物3代到4代从开放结构变为近乎球形的封闭结构的显著变化使G4表现出明显高于其他三代的笼效应。

By using AM1 semiempirical quantum calculation method, the structures and electronic properties of N-methyl- pyrrolo[3,4]C60 and N-methyl-2-(2'-dimethylaniline- substituted dithienylen-thylene)- pyrrolo[3,4]C60 have been studied.

利用半经验AM1量子化学方法研究了N－甲基－吡咯烷并[3，4]C60及其噻吩取代衍生物的几何结构。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！