| abstract |
The present invention provides the compound described in formula I or a pharmaceutically acceptable salt thereof. The invention also provides the preparation method of the compound. The structure of the compound of formula I of the present invention is very similar to pramipexole. In the process of preparing pramipexole, in order to better control the quality of pramipexole, the compound shown in formula I can be used as a reference substance for the production of pramipexole. Quality control provides a further guarantee for the safety of pramipexole products. |