racemic acid

1. The progress in synthesis of chiral mandelic acid and resolution of racemic mandelic acid are reviewed.
   综述了手性扁桃酸的合成及外消旋扁桃酸拆分的研究进展。
2. METHODS: The acetylized racemic mixture of D-penicillamine was prepared by racemizing acetyl chloride in acetic acid solu_tion with D-penicillamine as feedstock.
   方法以D-青霉胺为原料，在醋酸溶液中，用乙酰氯为酰化试剂进行消旋化，得到了D-青霉胺酰化消旋物；
3. Study on the racemic theory of essential amino acid and protein nutrition
   必需氨基酸消旋化理论的研究与蛋白质营养
4. Resolution of racemic 2-( 9-anthranyl)-2-hydroxyacetic acid and its derivations
   2-（9-蒽基）-2-羟基乙酸及其衍生物的外消旋体拆分
5. Glycidyl butyrate was synthesized from racemic epichlorohydrin and butyric acid by chemical means. The purity of the refined product was over 96% and the yield was about 47%.
   利用化学方法，由外消旋环氧氯丙烷出发，合成丁酸环氧丙酯，精制后可获得纯度96%以上的丁酸环氧丙酯，收率为47%。
6. Enantioselective esterification of racemic ketoprofen [ 2 ( 3 benzoylphenyl) propionic acid] was carried out in organic solvents by using celite adsorbed lipase as the catalyst.
   以硅藻土吸附的脂肪酶为催化剂，对外消旋酮基布洛芬〔2－（3－苯甲酰苯基）丙酸〕进行对映选择性酯化反应；

noun

1. the optically inactive form of tartaric acid that is often found in grape juice