The present invention provides a compound represented by formula (I):
wherein n is an integer selected from 1 to 20, Q is
A is cyano or the like; B is hydrogen, halogen, or the like; X
1
and X
2
are each independently selected from O and S; E is a C
1-4
alkyl group; and R
1
, R
2
, R
3
and R
4
are each independently selected from a hydrogen atom and a C
1
-C
6
alkyl group, and a drug, a pharmaceutical composition containing the compound, and the like.