Ultimately all the starting material is converted into products.
最终全部原料都转变成为产品。
The source of the starting material need not be identified, but may be requested.
起始原料的来源通常无需说明，但有时会要。
Methods Cidofovir was synthesized via 6-step reactions with cytosine as the starting material.
方法以胞嘧啶为起始原料，经六步反应合成西多福韦。
A special case, where the proposed change is to redefine the starting material, is discussed below.
下面我们将讨论有关变化旨在重新定义起始原料的情况。
A new solid base catalyst of calcium methoxide was made with calcium carbonate as the starting material.
以碳酸钙为基础材料，制成高效酯交换催化剂甲醇钙。
Methods:Zileuton wassynthesized via 3-step reactions with 2-acetyl benzothiophene as the starting material.
方法：以2-乙酰基苯并噻吩为起始原料，经3步反应合成齐留通。
Preferably the starting material is dissolved in methanol and a stoichiometric excess of ammonium hydroxide is added.
原料最好溶解于甲醇并加入过量氢氧化铵。
The two key intermediate ketones (A_3) and (B_8) were obtained respectively by the use of the starting material resorcinol.
两个关键中间体(A_3)和(B_8)可从起始原料间苯二酚得到。
The route which used hydantoin as the starting material showed lower costs and higher yield and is suitable for industrial-scale production.
以海因为起始原料的合成路线原料成本低，转化率高，更适合工业化生产。
Appropriate limits should be set in the specifications of the starting material, in order to ensure appropriate purity of the final substance.
为了保证最后产品的纯度，对起始物质应当建立一个适当的杂质限度。
In order to do so, superparamagnetic particles which connect to the alternating magnetic field are added to the resin of the starting material (1).
为此，可接入交变磁场的超顺磁性颗粒被添加到起始原料(1)的树脂中。
Methods: Rutin was utilized as the starting material. The target compounds were produced via benzoylation, hydrolysis, glycosidation and deproteination.
方法：以芦丁为原料，经苯甲酰化，水解，糖苷缩合和脱保护合成目标化合物。
The compound 2,4-dichlororesorcinol was obtained from the starting material 2,4-dihydroxybenzoate via chlorinated reaction, hydrolysis and decarboxylation.
以2，4-二羟基苯甲酸甲酯为原料，经过氯代反应、水解反应、脱羧反应合成2，4-二氯间苯二酚。
The certificate of analysis of the manufacturer/supplier of the starting material should be signed by a designated person with appropriate qualifications and experience.
起始物料的生产商/供应商检验报告应有负责人签名，其应具备适当的资质和经验。
METHODS Cefsulodin was prepared, taking phenylacetic acid as the starting material, followed by sulfonation, resolution, acylation, amidation and substitution, in 5 steps totally.
方法以苯乙酸为原料，经磺化、拆分、酰化、酰胺化和取代五步反应合成头孢磺啶。
Industrially, ammonia is the starting material for most other nitrogen compounds (especially nitrates and nitrites), whose main USES are in agricultural fertilizers and explosives.
氨是其它氮化合物(尤其是硝酸盐和亚硝酸盐)的起始物质，这些化合物主要用于农业肥料和炸药。
Methods Employing the stepwise glycosylation strategy, the target compounds were prepared via 10 steps of reactions using diosgenin as the starting material with an overall yield of 15%.
方法以薯蓣皂素为起始原料，采用逐步糖苷化策略，经10步反应制得目标化合物，总收率约为15%。
However, the most maximum theoretical yield of classical kinetic resolution is limited to 50% and the tedious procedures for the separation of the starting material and the product are inevitable.
而传统的拆分法仅能获得最高50%的产率，还需要繁琐的步骤来分离反应原料和产物。
With pHydroxybenzeneactamide as the starting material, the Bufemaxac was prepared by means of four steps reaction of alkylation, hydrolyzing, esterification and Ooximation with total yield of 46.5%.
以对羟基苯乙酰胺为原料，经烷基化、水解、酯化、氧肟化等4步反应合成丁苯羟酸，总收率为46．5％。
The starting material 2, 4-dinitroaniline was partially reduced in a mixed solvent to afford 4-nitro-1, 2-phenylenediamine.
用2,4 -二硝基苯胺为原料，在混合溶剂中进行部分还原，得到对硝基邻苯二胺。
The starting material 2, 4-dinitroaniline was partially reduced in a mixed solvent to afford 4-nitro-1, 2-phenylenediamine.
用2,4 -二硝基苯胺为原料，在混合溶剂中进行部分还原，得到对硝基邻苯二胺。
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