Compounds of formula I
1
as well as pharmaceutically acceptable salts and esters thereof, wherein R
1
, R
2
, R
3
and A have the significance given in the specification are provided. The compounds can be used for the treatment or prevention of obesity.
提供具有式I1的化合物,以及其药用可接受的盐和
酯,其中R1、R2、R3和A具有规范中给定的含义。这些化合物可用于治疗或预防肥胖。