The present invention refers to chemical compounds of formula (I)
as well as pharmaceutically acceptable salts and esters thereof, wherein R1 to R5 have the significance given in claim 1. These compounds can be used for the preparation of medicaments.
本发明涉及
化学式(I)的化合物,以及其药学上可接受的盐和酯,其中R1至R5具有权利要求1中给出的意义。这些化合物可用于制备药物。