A compound represented by the formula (1): wherein A, B, R
1
, L
1
, R
2
, L
2
, L
3
, Y, L
4
, R
3
and X are the same as defined in the description, a tautomer, prodrug or pharmaceutically acceptable salt of the compound or a solvate thereof.
一种由式(1)所表示的化合物:其中A、B、R1、L1、R2、
L2、L3、Y、L4、R3和X的定义与说明中相同,该化合物的互变异构体、前药或药学上可接受的盐或其溶剂。