Ropinirole,a dopamine agonist,has similar effect of dopamine but without ergoline structure by which its stronger binding power with dopamine D2 receptor may be explained.

罗匹尼罗是一种类似巴巴剂，第一代巴剂不同是没有麦角林结构。罗匹尼罗非麦角林结构可以说明其巴D2受体有较高结合力。