| abstract |
There is provided compounds of formula (I), wherein E1, E2, E3, E4, L1, Y1, Y2, Y3, Ra and z have meanings provided in the description, and pharmaceutically-acceptable salts thereof, which compounds are useful in the treatment of diseases in which inhibition of leukotriene C4 synthase is desired and/or required, and particularly in the treatment of respiratory diseases and inflammation. |