1.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.

1.罗匹尼罗似多巴胺多巴胺激动剂，第代多巴胺激动剂不同有麦角林结构。罗匹尼罗非麦角林结构可以说明其多巴胺D2受体有较高结合力。