There is provided compounds of formula (I), wherein R
1
, R
2
, X
1
, X
2
and n have meanings given in the description, and pharmaceutically-acceptable salts thereof, which compounds are useful in the treatment of diseases in which inhibition of the activity of a lipoxygenase (e.g.
15
-lipoxygenase) is desired and/or required, and particularly in the treatment of inflammation.