The present invention is a chemical compound of formula (I)
1
or a pharmaceutically acceptable salts, solvates and esters thereof, wherein R
1
to R
4
, A
1
, A
2
m and n are as described in the specification.
本发明是一种具有公式(I)的
化学化合物
1
或其药物可接受的盐、溶剂化物和酯,其中R
1
至R
4
,A
1
,A
2
,m和n如说明书中所述。