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,环合等反应合成左西替利嗪盐酸盐,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-胱氨酸高度的左性是由其分子的特殊螺结的。

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和左布比卡作为单一的左对映异,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宽，检测下限低，各项性能良好，回收率测结果满意。