左旋

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

以苯甲酰氯为原料,经酰化,还原,环合等反应合成西替利嗪盐酸盐,反应总收率为8.05%。

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

指出了L-胱氨酸高度性是由其分子特殊螺结构决定。

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.

近年研罗哌卡因和布比卡因作为单对映异构体,因其良好局麻效应和小全身毒性正引起广泛关注。

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、咪唑、黄连素等响应线性范围宽，检测下限低，各项性能良好，回收率测定结果满意。