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旋布比卡作为单一旋对映异构体,其局麻效应较小全身毒性正引起广泛关注。