申请人:Pfizer Limited
公开号:US20170197965A1
公开(公告)日:2017-07-13
The present invention relates to imidazopyridazine derivatives. More particularly, it relates to 4-(biphenyl-3-yl)-7H-imidazo[4,5-c]pyridazine derivatives of formula (I):
and pharmaceutically acceptable salts thereof, wherein R
1
, R
2
, R
3
, R
4
, R
5
and R
6
are as defined in the description. The imidazopyridazine derivatives of the present invention modulate the activity of the GABA
A
receptor. They are useful in the treatment of a number of conditions, including pain