The present invention provides piperazine derivatives of formula (I)
as well as pharmaceutically acceptable salts and esters thereof, wherein R
1
to R
5
have the significance given in the description. They can be used for the treatment of obesity.
本发明提供了式(I)的
哌嗪衍
生物,以及其药学上可接受的盐和酯,其中R1到R5具有描述中给出的含义。它们可用于治疗肥胖症。