The natural surface active substance obtained from the sapindus mukorssi contains terpenoid, steroid saponin, amine acid, protein, vitamin, oleic acid, oil and so on.

从无患子中提取出天然表面活性物质。该表面活性物质中含有萜类甾体皂甙及氨基酸、蛋白质、维生素、油酸、油脂等。

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Screening for 2 - bromo-butyric acid as the starting material, after ammonolysis, esterification, ester amine solution, split, five-step cyclization reaction Levetiracetam.

筛选以2 -溴代丁酸为起始原料，经氨解，酯化，酯胺解，拆分，环合五步反应制得左乙拉西坦。

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Solid phase synthesing method of aldehyde, ketonic, oxime, amine and isohydroximic acid compound.

醛，酮，肟，胺和异羟肟酸化合物的固相合成方法。

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These are an amine group, an acid group (hence the name), a hydrogen atom, and a fourth chemical group that can be any one of 20 different clusters of atoms.

ECONOMIST: Folding stuff

Amino acids link together to form a protein when the amine group on one reacts with the acid group on the next.

ECONOMIST: Folding stuff