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.

近年研究较多罗哌卡和左旋布比卡单一左旋构体,其良好局麻效应和较小全身毒性正引起广泛关注。