Levocetirizine Dihydrochloride was prepared from benzoyl chloride by acidylation,hydrogenation,cyclization with an overall yield of 8.05%.

以苯甲酰氯,经酰化,还,环合等反应合成左西替利嗪盐酸盐,反应总收率8.05%。

The high laevorotation of L-cystine depends on a specially helical structure of its molecular.

指出了L-胱氨酸高度的左性是由其分子的特殊螺结构决定的。

As single laevo-enantiomers,ropivacaine and levobupivacaine which have been generally researched are attracting extensive attention for their better anaesthetic effect and less system toxicity.

近年研究较多的罗哌卡因和左布比卡因作单一的左对映异构体,因其良好的局麻效应和较小的全身毒性正引起广泛的关注。

The electrode showed wide linear response range, low detection limit, satisfactory average recovery for Berenil Xyalzole, Levamisole and Berberine.The electrode gives good other characteristic.

电极对兽药血虫净、静松灵、左咪唑、黄连素等的响应线性范围，下限低，各项性能良好，回收率定结果满意。