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.

近研究较多罗哌卡因和左旋布比卡因作为单一左旋对映异构体,因其良好局麻效应和较小性正引起广泛关注。