Pyrolysis of Propyl Malonic Acid and Isopropyl Malonic Acid and Their Conversion to Valeric Acid and Iso valeric Acid in Tobacco Smoke

丙基丙二酸和异丙基丙二酸热分解向 卷烟烟气释放戊酸和异戊酸的研究

Most of the specimens containing acetic acid propionic acid butyric acid isobutyric acid valeric acid lactic acid and succinic acid which were accorded with the result of bacteriologic study .

在大多数标本中含有乙酸、丙酸、丁酸、异丁酸、 戍酸、乳酸和琥珀酸，与细菌 培养的结果基本相符。

Elements on the Quality of Valeric Dialdehyde Preparation

影响 戊二醛 制剂质量的 几个因素

Carbonylation of T butyl alcohol to ester of I valeric acid catalyzed by palladium catalyst

钯 － 膦 －酸 体系催化叔丁醇羰化制 备 异 戊酸酯

The paper introduced the improved sterilization and stability of valeric dialdehyde preparation when added with strengthening agent B.The effect of pH value to the preparation was also discussed .

介绍了 戊二醛 制剂中加入强化剂B后，加强了 它的杀菌效果和稳定性，以及pH值对 戊二醛制剂的影响情况。

The physical property of pregabalin and six different synthetic routes for preparing pregabalin starting with 4-methyl valeric acid and isovaleraldehyde were introduced separately .

介绍普瑞巴林的物理性质及其6种分别以4-甲基 戊酸和异戊醛为原料的不同合成方法。

One of the methods is studied to synthesize 1 . The reaction is carried out from a material of valeric acid and 1 is prepared by bromization hydrolysis and reduction .

研究了1戊二醇的合成方法，以正 戊酸为原料，经过溴代、水解和还原反应制得1戊二醇。