| abstract |
Chemical Compounds 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 and R 5 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. |